How bout we all just listen to Steve's incredible work on Autopsy's Fiend For Blood, undoubtedly one of the best bass performances on any metal album. IMO, Steve's playing completed Autopsy's music, without him, it doesn't feel exactly right.
Atheist is another one but, also quite obvious.
More albums with great bass work...
Gorguts - Obscura and From Wisdom To Hate
Hibria - Defying the rules
Pestilence - Spheres (They've already been listed but I wanted to point out this album specifically because it was one of Jeron Paul Thesslings early albums, he doesn't do anything crazy and technical however, without him on this album it wouldn't have been nearly as good do to all of the odd bass harmony's he adds.)