Tool
The Crimson King
These are what I'm listening to heavily right now, not all the bands I've listen to in the genre.
Traditional metal:
Iron Maiden, Black Sabbath, Ozzy
Power metal:
Rhapsody, Blind Guardian, Sonata Arctica, Nightwish, Angra, Stratovarius, Symphony X
Progressive rock/progressive metal:
King Crimson, Yes, Tool, Dream Theater, Opeth
Thrash
Metallica, Slayer, Iced Earth
Death/Black metal:
In Flames, Soilwork
Rock/Punk:
Sex Pistols, The Clash, Bad Religion, Queen, Styx, Audioslave, Queens of the Stone Age
Techno/industrial metal
Rammstein, Stabbing Westward, Static-X
"Nu Metal"
System of a Down (Yeah, go ahead and shoot me)
Traditional metal:
Iron Maiden, Black Sabbath, Ozzy
Power metal:
Rhapsody, Blind Guardian, Sonata Arctica, Nightwish, Angra, Stratovarius, Symphony X
Progressive rock/progressive metal:
King Crimson, Yes, Tool, Dream Theater, Opeth
Thrash
Metallica, Slayer, Iced Earth
Death/Black metal:
In Flames, Soilwork
Rock/Punk:
Sex Pistols, The Clash, Bad Religion, Queen, Styx, Audioslave, Queens of the Stone Age
Techno/industrial metal
Rammstein, Stabbing Westward, Static-X
"Nu Metal"
System of a Down (Yeah, go ahead and shoot me)