VR is a new band made up of older dudes from Guns N Roses and the Stone Temple Pilots and some random guy. They kick ass, check out "Slither" especially.
Black Sabbath, as everyone should know, started the genre that most people call Heavy Metal, and they kick ass. Front man Ozzy Osbourne (now old and crippledish from drugs) had the most bad ass metal voice of all time... God I love them.
But really, check out Velvet Revolver especially, I was just mentioning Black Sabbath for no apparent reason other than the fact that they are really fucking cool.