You're quite low on arguments... Well, My choices:
Mikael Åkerfeldt: He has found his way of singing early and has also developed it all the way.
L.G. Petrov / Matti Kärki: Pioneers of Swedish Death Metal. They both have a superior grunting, maybe Kärki has a little bit better voice... I can't decide...
Bruce Dickinson: A GOD. From "Number of the Beast" to "Brave New World" very strong world, not to mention his solo works...
Robert Smith: Singer of The Cure if you don't know. He has god-like melancholy in his voice in his voice, which pales the face of ANY gothic singer. Period.
Andrw Eldritch: Another creator of melancholic voices. Maybe a forehather of ALL things laconic. Anothr Period.
Sorry about the typos, I'm drunk....