I only know a lot of old school rock bands but here are a bunch of current metal bands broken down into genre.

BLACK METAL:

The Amenta
Behemoth
Dimmu Borgir
Mayhem
Acturus
Wintersun
Borknager

DEATH METAL:

Killrazer
Suffocation
Decapitated
The Dead Shall Rise
Slayer
Entombed

THRASH:

Testament
Sodom
Vader
Anthrax

AMERICAN METAL:

Killswitch Engage
Lamb of God
Stonesour
Rob Zombie
Slipknot

EUROPEAN METAL:

Soilwork
Scar Symetry
In Flames
Arch Enemy

POWER METAL:

Dream Evil
Iron Maiden
Hammerfall
Primal Fear
Nightwish
Dragonforce

GORE:

6 Feet Under
Cannibal Corpse
Nun Slaughter

Sorry I have no idea about punk!