Hmm. This one is tough.
I'm going to say :
1) Savage
2) 6534
3) JVM
1 is a bit on the scooped side, like most ENGL's I've played tend to be. Savage less so but, the Savage also seems to have this upper midrange grind to it.
2 sounds like a Peavey bark.
3 has the mid structure of...