Holy fuck buy Necroticism now. That is by far Carcass' best and it is one of the fucking cornerstones of grind/death. Reek is much more raw and along the lines of Napalm Death's "Scum". Most people hate those two unless you really like raw grind (Especially "scum"). I dont really consider Mithras to be "vile" death metal in the sense of Carcass, Demilich, etc. You also should definetly pick up Aborted's "Goremageddon" Saw and the Carnage Done." They basically picked up where carcass left off with Necroticism ( I still like Heartwork but the earlier stuff still wins out IMO). Its one hell of an album. Autopsy is really good raw old death metal.
Some more are Repulsion, Nihilist (Pre-Entombed), Circle of Dead Children ( there more Grind but there still very brutal), Regurgitate, Origin.