Pantera fucking rules, I mentioned them in my list but not enogh I guess. I have listened extensively to them, and my favourite cd:s are Vulgar display of Power and Far beyond driven.
I don't like Arch Enemy that much, at least not since Angela Gossow. Don't get me wrong though, she is excellent but the songs don't do it for me, I liked Black Earth more.
Cradle has some decent songs...
Mastodon are awesome, period. Leviathan kicks serious ass, and has a special kind of atmosphere that can't really be expressed in words.