Alright, I'm looking for the scariest, most brick-shitting inducing vocals the metal world has to offer, that send shivers down your spine every time you hear them and send the family pet cowering behind the sofa.
Seconding Wormed. A bunch of slam death is also worth checking out if that's your thing. Also, Barnes-era CC. As far as black metal goes...Mayhem's Deathcrush had some really freak-out vox.