look into black metal. it owns all other metal.
Immortal
Naglfar
Darkthrone
Vinterland
Old Man's Child
I.C.E
Dark Tranquility
Dimmu Borgir
thats all i can think of off the top of my head, but go to the best site for metal, it lists everything:
http://www.tartareandesire.com/index2.html
just click bands and they are alphabetical. it has lists of black, power, or whatever metal u prefer. o and bookmark that site