My metal library is kind of small, who would you suggest?

I'm into extremely heavy and gut wrenching metal. Whether its grindcore, metalcore, death metal, doom metal, Viking metal etc. I love break downs and heavy double bass along with gutteral growls and screams. Examples include Cradle of Filth, Lamb of God, Cannibal Corpse, Suicide Silence, We Butter the Bread With Butter, Despised Icon, Job For A Cowboy, The Agonist, Amon Amarth and many more. But I know there are more out there I just need some help pointing me in the right direction.