This is not for listing your favorite singer. Ozzy, Joey Ramone, Lemmy, and Kurt Cobain do not qualify here, so don't post them. I love their voices, but they aren't famous for their vocal ranges.
This is for listing singers you may or may not like but have to respect for their incredible octave ranges (as in, how freaking high can they go?). I've come to find that singers that fit this qualification often have voices that a lot of people don't like. This is essentially a list of singers who can switch octaves quickly and reach high notes hardly any other guy can.
: Bruce Dickinson - Iron Maiden (he can't do The Number Of The Beast's famous scream anymore though)
: Rob Halford - Judas Priest
: Michael Kiske - Helloween (I really don't care for his voice at all, but damn, he might just have the best range out of all of these guys)
: Freddie Mercury - Queen
Any other suggestions? Please, DO NOT simply list the singer from your favorite band. Looking for range here, not how good it sounds or how unique it is.