(long post) Thank you MaryK for your advise - truly appreciate! I hope your youngest dog is feeling a bit better already and full recovery is only a days away

And Brody'sMom, wise words - yes, the problems are biggest when our dogs are leashed and others are not! Off leash she is just fine, he gets aggressive if the other dog stays around too long (and his patience is about 5 seconds)
Yes, Lucy is from the pound (saved in a very last second) and Archie is from a backyard breeder and Yes, they are spoiled with love and affection for I wanted them to only have the best and forget their past.
I have introduced walking them separately and we have had few mornings now when he takes one and I take the other so we can focus on them better, nothing major, just walking and strolling. Not that there is much difference apparently and my husband says that a) Archie has not that kind of behavior at least as bad as he has with me and b) when Lucy is not around Archie is a lot calmer for some odd way (so it seems they fuel each others problems).I bought these harnesses for them the other day,useful for her for she keeps pulling (so excited to go to walks, every time) - he used to be really good with walks but now he has started to pull too. I also spoke to buy a head collar or a muzzle for him, just in case ( I know what the reaction is when other people see him wear it, it will make him the "killing machine"). My husband is not so "strict" with these as I am, he just lets them pull but does not walk faster (

drives me crazy). Oh and with being "dominant" I meant he is more confident with dogs and doesn't stress so much if they get a bit growly or misbehave, he says "they are dogs", he is really relaxed and has authority (dominant was probably wrong word). I stress about everything so sometimes I think I am the biggest cause of this.I have so many questions and really do not know where to start.
Archie definitely is scared of dogs and tries to keep dogs away from me and shows all the signs of scared dogs when others approach him (unless it is a small, timid dog, then he gets all mighty high). If there is a dog approaching, he will place himself between the dog and me. And he stays there until I have walked pass the other dog. He blocks dogs from moving (I see it as bullying) - he decides that you are not going anywhere and the poor pup just stands there confused when Archie denies all access to any direction. Am I right to think this is bullying behavior? The worse situation is if the dog manages to get near me, Archie will lose it immediately. As he is powerful dog I really fear that he will hurt the other dog - so far it has been more of a snapping, growling and chasing though but it does not look good for the other owners...

I am just so scared that we end up in trouble because of this for other dog owners do not seem to get that we prefer NOT to play with their dogs. Then again small dogs are automatically picked up when they see us for our dogs look a bit "different" (yes, they would probably be unapproved dogs in some states in USA just because the way they look).
I have been reading about the positive reinforcement and I feel that there are cases where I have gone wrong. Specially when they on leash or off start lunging towards other dogs growling, I growl at them to get them back. And once they do what I want I praise, use "happy voice" and give them treats and direct their focus on something else. Not sure if this is the right approach but feel the growly part might not be the proper way to do this...

I try to keep my voice always happy and joyful when I want them to do something and surely they seem to respond and they are so much better than they were in the beginning (specially Lucy who did not obey anything at first).
Anyway, today I had to walk them together for my husband had to leave in the middle and it was too far to turn back to take the other back home..too exciting for me for I really stress these situations. All went well though almost all the way. This is quite not about the leash aggression btw, for they were lose this time.I am a bit shaken still and need to tell you to get some ideas how to continue from here...
When I let them lose on our nearby football ground for it was empty (I tried to pick a time when there is no others - yeah, good luck with that) and we did some obedience training - just basic stuff to get them listen. Once I was on the other end of the huge field I saw a guy with 4 dogs entering the area from the opposite end - I got immediately anxiety, took my boy's leash ready but thought that it would be cruel just because on the far end there are other dogs and it might alert him unnecessarily, so we continued happily on our way, I kept them occupied with my voice and petting them (cursing myself for not taking the balls for them with me - which every now and then actually is worse for it "invites" other dogs to join!), playing with them and we kept on walking. I tried to keep our distance with the other lot as much as I could to avoid problems. But yeah, this guy did not. His dogs ran all the way from the far end of the field to us!!!
I was completely of guard for they came from the direction I was not looking and they were quite big dogs (one being labrador, one or two some sort of hunting dogs and one, maybe a mix?) and they just came in one big gang in one go full speed...you can imagine how scared I got (realized I am a bit scared of such dogs and situation) but I decided to keep walking, kept my happy voice going, tried to pull all my confidence up and keep an eye on all the 6 dogs. I saw Archie starting to stress, his back hair was up but he still came next to me (did not call him btw), I could feel him pressing against my leg as we walked forward - Lucy does not get bothered by other dogs by the way when she is off leash, she is lucky that way, she just goes around and only gets aggressive if Archie starts growling - I kept walking, praying the owner would call the dogs away for we were getting really uncomfortable. Finally he called them from the other end of the field and 3 of the dogs left...I kept walking, hoping the last one would bugger off...and after some calls ,he did but it was enough for Archie and he took some steps after the dog growling - I called him off and come, he came nicely, sat in front of me and same did Lucy. I was so relieved that he behaved so well, he only lost it in the very end....I wonder, should I have leashed him straight away when he came to me scared? I am so afraid of enforcing any kind of aggressive behavior you see...

This is really tricky for me, a true puzzle. He was fine next to me and started to relax while we were just walking but when the fourth dog just ran past us, he lost it.
The other thing I am concerned is that my happy voice and manners actually interest these other dogs too so they keep happily following us?!? Or the treats, there has been cases where I give treats to my dogs to thank them and keep them interested and the other dogs just happily step in line to get theirs?! And since I do not know them I of course do not give them any but this situation creates stress to my dogs who clearly state "what are you doing here trying to get my treats???". Am I to not give treats to my dogs as long as there are others around? Should I change my way of speaking my dogs if other dogs start paying attention??

Advise?
I was a nervous wreck and counting my stars...phew... this is something I really dislike, people not keeping their dogs close enough..I mean sure they can wander around but to run on the other end of the huge double football field??? I like to keep what I call "mental umbilical cord" with my dogs so that they are never but maybe max 10 meters away from me so they can hear me and respond fast. Is this exaggeration ? To be honest I would love to have my dogs only few meters away from me all the time and play when I say it is ok. And this play thing works for they break up when I ask them to come. Am I looking for perfection that does not exist?
In our town we have several off leash (or on leash, one can decide) areas like fields and beaches where dogs can interact and run around, and as they are not puppy parks as per se, they are very free areas - but of course problematic to us. The other day I had to ask a lady to call her dog away when it ran to Archie (leashed) for he is not good with too excited, happy, jumpy, in-your-face dogs anyway. One day we walked them on a leash on the same football field and there were heaps of dogs unleashed while kids were playing football. And of course one puppy ran to Archie!!

And he and Lucy went crazy... I knew it was a mistake to bring them with us for there were way too much happening for them to be able to digest - yet are we to be always choose solitary? I guess my monsters have a bad name already in our neighborhood
I just want them and us to have relaxed time and other people realize that we do not leash them for they are aggressive as per se automatically but to prevent accidents and hope they would respect that. Oh well, we got lucky again....step by step . Thinking of asking help from dog whisperer with Archie though for I do not have any friends here who have dogs to train with and we do know few people with dogs but we are not "friends" as such. We need to become more social to solve this I know. Ask people if we could train with them. That training you suggested would be so awesome!! I can definitely see how much good it would do to Archie. But with the dog whisperer, what do you think, would it help? I know she can bring a dog with her or take ours to be assessed to her place. Our local K9 clubs are not that inviting and welcoming to be honest, they are pretty posh and made it pretty clear that our pups are not welcomed unless they pass some other courses....

I just really need some help.