You'll find plenty of people around here with anger management problems. not so many with a solution though.
I know it's a serious problem you're dealing with, and I hope you haven't come off on the wrong end of his anger although I suspect you have if you're posting here.
I wonder why you can't find guidance from people other than those who preach to solve problems? Is his anger connected to substance abuse? If so, there's a simple answer there...although in practice it's not so easy of course.
All I can suggest is to keep reading and looking for someone who might be able to help one on one rather than group therapy which often seems to involve prayer.
My answer to domestic violence/anger issues has always been to leave, so I can't offer you much useful advice I'm afraid.