Testament hands down. Morbid Angel is garbage.
I think that putting extreme death metal bands against more mainstream metal bands isn't really a fair competition.
Really? Garbage? One of the most legendary Death Metal bands of all time is Garbage? How so?
Alters of Madness and Blessed are The Sick are 2 of some of the best metal albums of all time IMO, death metal or not.
http://www.youtube.com/watch?v=vgw3mOFU2q4
3:20 is probably the best death metal part i have ever heard