Oh good god. Serj Tankian is a one of a kind and absolutely amazing at every vocal range but Mark Hunter from Chimaira, man... that's where it's at. The way his voice flows naturally with their music sends chills down my spine. Definitely the grooviest metal singer ever. He definitely knows how to make music. Real music.

I think it depends on the genre but those two and Chris Comrie, who does backing vocals and growls for Attila, is fucking bad ass. The band could go on without Chris Fronzak and bring back Chris Comrie and they would go up in flames. Such a shame he's no longer part of the band.