Aggressive dogs?

There is imo ONCE chance, redirect their aggression to the prey. But still you most surely would not be able to trust these dogs around other dogs totally.

Show them what is okay to "fight" and what NOT.
Do not know if I can write this here...( If not ) please just delete my post.
Put a good size boar in a pen, the other dogs next to the pen, if they ( One by one) Show agression towards the other dogs, let them understand that this you do NOT wanna see one more time, and throw them in the pen immediately. IF good, praise.

Simple learning, even a unsocialised pup would understand this.
Continue some times with this..if they do not understandquite fast in few times, forget it.
That there is 2 dogs together makes it all worse, they feel stronger together, do this test one by one, so they do not feel the back up of the other dogs. If you are lucky maybe one of them show a little brain. Good luck!
B