Here´s few "not-white" great rock (loud) albums:
the Jimi Hendrix Experience: Are You Experienced
Death: ...For the Whole World to See
Bad Brains: Rock For Light
Living Color: Time´s Up
Fishbone: Give a Monkey a Brain and he´ll swear he´s the center of the universe.
As Band Called Death-document shows, there was racism behind that, the rock was so white specially in the sixties & seventies. Nowdays the colour of the skin doesn`t of course matter in rock, but as said, true rock has mostly disappeared. I just wondered why even seventies punk was mostly white? Many punks liked reaggae and was anti-racists, but still most of the known punk bands were white...