Metal bands that don't suck.

[The One and Only...]

Dark Funeral, Agoraphobic Nosebleed, Cannibal Corpse, Haemorhhage, Dead Infection, Pig Destroyer, Marduk, Scar Culture, Electric Wizard, Cryptopsy, Dying Fetus, Suffocation, Nile, Exhumed, Grave, Napalm Death, early Carcass, Noism, Bane.

There's more, I just can't think of all of them off the top of my head. And check out the band of a guy off another forum - Bloody Anal Yeast Infection.

BTW: What's the appeal of noisecore? It doesn't sound heavy to me at all, just random and noisy.