Chris Cornell, Scott Weiland, Mark Lanegan, Mike Ness, Layne Staley, Claudio Sanchez, etc.. lots of good rock vocalists I would rank up there with Corey. I'm not a huge Slipknot fan, but he does have a great voice. It's not all about screaming, I like vocalists that have a unique sound...not necessarily the most range. Corey definitely has his own sound, which is refreshing in a time when every artist on Rock radio sounds like some variation of the Killers or Strokes or some other shitty flavor of the week band.