Gorguts - The Erosion of Sanity (YES i know Obscura, but this is far more evil and twisted imo)
Cryptopsy - Blasphemy Made Flesh (bass heavy but cold and icy at the same time)
and I guess None So Vile even though youve probably already heard it, I always found it to have a strangely baroque (right word? probably not.), romantic quality
and someone already mentioned Demilich, thats CRUCIAL also