Cannibal Corpse, Cradle of Filth, Pantera and Death
in order of talent and introducing / adding / morphing something in the metal genre as a whole
Death (Human and Individual Thought Patterns had some stuff that i had never before heard in detah metal, as in orginal) - Yessss i was a big fan of Atheist and Cynic so ...
Pantera - Cowboys and Strength all have orginal heavy moments, (taking the guitar sound strange heavy places and some angry songs) though lack consistency
Cradle of Filth - Principles and Dusk (original and hilarious english take on BM)
Cannibal Corpse -
-i cant think of one album that added something to the genre, except medicority
as the ageless_stranger said :
"Their music is blank and hollow, so the standard argument used is that they are a hollow imitation of death metal. They essentially created "generic death metal."