Benton is a junkie. He
should have killed himself.
Old Deicide is fucking excellent though.
Cathedral is doom metal. Not Death, as stated above.
Check out Cryptopsy, Wormed, Martyr, Decapitated, Lykathea Aflame (weird melodic but brutal death metal.

), Devourment, Nile and Yattering.
Aborted and Avulsed are fucking good too.