Who's got the greatest vocal range in metal?

Cruithne said:
Rather typically most people are concentrating on the high notes.

Let me remind those people that range means RANGE, not how high a singer can go. Singing a high Bb means NOTHING in range terms if that singer can't go further than an octave below middle C...
Well, I was talking both high and low, and I've never heard any singers go as high as Midnigh, while still being able to sing really low. The only one I can think of now, would be a young Rob Halford, his screams in "The Ripper" and "Dissident Agressor" are some of the highest I've ever heard anyone sing.