Necrophagist
Wintersun
Cannibal Corpse
Angel Corpse
Amon Amarth
Bathory
Catamenia
Death
Deicide
Immortal
Mercyful Fate
Nile
Norther
The Black Dahlia Murder

Those are a few of my personal favorites, it would seem you might enjoy them judging from what you already listen to.

I highly recommend Necrophagist though.