LAMB OF GOD!!! The Ashes of the Wake album makes me want to kick random people. And Event though they are metal band, Randy Blythe's screaming is pretty easy to understand.
HW- Randy "The Natural" Couture
LHW- Forrest Griffin
MW- Jason "MAYHEM" Miller, Rich "Ace" Franklin
WW- Matt Hughes, Georges "Rush" St. Pierre
LW- Genki "The Neo Samurai" Sudo
FW- Jens "Lil Evil" Pulver