TS, do you just mean bands that use screaming? Like not proper 'technically correct' screamo? Cause if so good ones off the top of my head.
-Amity Affliction
-All That Remains
-Misery Signals
-Parkway Drive
-Dropsaw
-Modern Life Is War
-The Red Shore
-No Apologies
(The majority of which is aussie, i love aussie heavy music)
Or did you mean the proper screamo stuff that genre nazi's will flame you for using for anything else which is stuff like; Circle Takes Square, Saetia and more currently The Blood Brothers...
That's just cause NOFX, particularly Fat Mike, are a bunch of wankers way past their time.
Or maybe I just really don't like NOFX and like Underoath a fair bit...