Can also be hardcore bands

Iron Maiden
Parkway Drive
Metallica
System Of A Down
A Day To Remember
The Devil Wears Prada
I Killed The Prom Queen
Alexisonfire
Trivium
Bring Me The Horizon
I Set My Friends On Fire
Escape The Fate
Bullet for My Valentine
Machine Head
Korn
As I Lay Dying
Underoath
Bleeding Through
All That Remains
Slipknot
Soulfly
Testament
Autumn To Ashes
DragonForce
Avenged Sevenfold
Lamb Of God
Killswitch Engage

Black Sabbath
Ozzy Osbourne (solo)
Iron Maiden
White Zombie
Metallica
Motörhead
Faith No More
Judas Priest
Slayer
Lordi
Machine Head
Pantera
Deftones
Korn
Amorphis
In Flames

Metallica
Iron Maiden
Judas Priest
Black Sabbath
Opeth
Dio
Ozzy Osbourne
Megadeth
Sepultura
Pantera
Slayer
Heathen
Testament
Between the Buried and Me
Killswitch Engage
Lamb of God
As I Lay Dying
Parkway Drive
Machine Head
Katatonia
Immortal
Behemoth
At the Gates
Scorpions

Fair few more of course, but that'll do lol. Favourite genres are Traditional (old school stuff), NWOBHM and Thrash.

Judas Priest
Iron Maiden
Metallica
ACDC
Black Sabbath
Ozzy
Dio
Queensryche
Megadeth
Slayer
Motorhead
Lordi
DragonForce
Whitesnake
KISS

etc...

Pantera
Black Sabbath (Ozzy & Dio)
Iron Maiden
Metallica ('83-'94)
Megadeth
Slayer
Motorhead
Judas Priest
Rob Zombie
Anthrax
Sepultura
Danzig
Trivium
Dillinger Escape Plan
Ozzy
Dio
Testament
Overkill (Just Starting)
Quiet Riot (Hated them when i was younger but Hadn't heard Metal Health. it's a great song Don't know if one song is enough)

IKTPQ
parkway
carpathian
anthrax
pretty much sums me up