My list don't seem as brutal as some others but:
Pantera Favorite band ever
Dethklok
All that Remains
Trivium
Bullet for my Valentine (not the fever album)
Throw in some Rise Against and definitely Flogging Molly
Just let liquid metal on sirius or pandora play.
And I swear to God I heard at least 8 good songs in a row on Lithium on Sirius. Good stuff.