Glenn Danzig - Mistifts/Samhain/Danzig
Zakk Wylde - Black Label Society
William DuVall - AIC
Thom Yorke - Radiohead
David Coverdale - Deep Purple/Whitesnake
Paul Stanley - Kiss
Sebastian Bach - Skid Row
Geoff Tate - Queensryche
Doug Pinnick - King's X
Robin Zander - Cheap Trick
Klaus Meine - Scorpions
Don Dokken - Dokken
Scott Weiland - STP/Velvet Revolver
Pepper Keenan - COC
Jimi Hendrix
And yes, Anselmo is very underrated because people only think of the throaty, grinding style but he can really sing in the "traditional" sense as well.
Here are a few similar threads:
http://www.cigarasylum.com/vb/showthread.php?t=17853
http://www.cigarasylum.com/vb/showthread.php?t=25449