Giant Squid / Grayceon
Fuck, that's eleven. Oh well - I'm not taking any one of those off the list...deal with it.
EDIT: I'm already having writer's regret that I didn't have Meshuggah and Arch Enemy on there. This shit is way to hard. Damn you, Jeff.
EDIT2: High on Fire, Made Out of Babies, Pig Destroyer...damn you, Jeff.