Too many to mention them all, as others have said.

But here we go:

Vektor
Aspid
Voivod
Crowbar
Mastodon
Animals As Leaders
Slayer
Old school metallica
Anthrax
Municipal Waste
Nuclear Assault
Misfits (although not technically metal)
Annihilator
Jason Becker
Pantera

I, too, have too many favorites to list in one post, but to name some that come to mind right offhand:

King Diamond
Mercyful Fate
Lizzy Borden
Omen
Fates Warning
Iron Maiden
Bruce Dickinson
Judas Priest
Fight
Halford
Black Sabbath
Ozzy Osbourne
Dio
Yngwie Malmsteen
Iced Earth
Helloween
Hirax
Phantasm
Anthrax
Overkill
Slayer
Metal Church
Exciter
Annihilator
Rigor Mortis
Sodom
Kreator
Destruction
Venom
Cronos
Bathory
Dimmu Borgir
Midvinter
Old Man's Child
Moonspell
Children Of Bodom
Hypocrisy
Skeletal Witch
Darkthrone
Anorexia Nervosa
Ancient
Cradle Of Filth
Danzig
Cannibal Corpse
Six Feet Under
Nile
Vader
Behemoth
Death
Napalm Death
Possessed
Celtic Frost
Morbid Angel
Hate Eternal
Entombed
Suffocation
Shadows Fall
Lamb Of God
Black Label Society
Misfits
S.O.D.
M.O.D.
Suicidal Tendencies
Thin Lizzy

There's plenty more, but we can stop here for now...::cool::

AWS

black metal fan
 

Most of my favorite bands are european black metal bands. Some are english, and even a few from right here in the U.S. It would take an hour to list them all and I would probably still forget some. Here's a "short" list.
BEHEMOTH
WATAIN
INQUISITION
SEPTIC FLESH
ROTTING CHRIST
MELECHESH
OPETH
EMPEROR
IMMORTAL
DIMMU BORGIR
NEVERMORE
BATUSHKA
WINTERFYLLETH
NOVEMBERS DOOM
TESTAMENT
ICED EARTH
PRIMORDIAL
MARDUK
HYPOCRISY
ENTHRONED
DARK FUNERAL
BATHORY
ABBATH
and many more.

Really been getting into the Russian pagan and folk metal groups here lately. Really enjoy Arkona, Alkonst, fferyllt

Symphony X
Beyond Twilight
Keldian
Bruce Dickinson (solo career)
Amorphis
Rhapsody (of Fire)
Therion
Dragonland
Dark Moor
Vanden Plas
Kamelot
Cradle of Filth
Dimmu Borgir
Limbonic Art