Is there a metal band genre database anywhere?

Sorry this is the best i could do to help you.

Early metal (1966−1971)

Cream; Jimi Hendrix; Blue Cheer; Deep Purple; Led Zeppelin; MC5; Mountain; The Stooges; Black Sabbath

Original hard rock (1974−1979)

Thin Lizzy; Blue Öyster Cult; Aerosmith; AC/DC; Ted Nugent

Shock rock (1968−1983)

Arthur Brown; Alice Cooper; New York Dolls; Kiss; Ozzy Osbourne; W.A.S.P.

Early punk (1976−1979)

The Ramones; The Damned; Sex Pistols; The Clash; The Dead Boys

Power metal (1976−present)

Scorpions; Judas Priest; Rainbow; Accept; Manowar; Dio; Yngwie J. Malmsteen; Helloween; Blind Guardian; HammerFall; Primal Fear

New Wave of British Heavy Metal (1979−1983)

Motörhead; Saxon; Iron Maiden; Angel Witch; Girlschool; Tygers of Pan Tang; Diamond Head

Progressive metal (1970−present)

Uriah Heep; Rush; Queensrÿche; Savatage; Fates Warning; Voivod; Dream Theater; Meshuggah; Symphony X; Evergrey

Glam metal (1973−1990)

Slade; Sweet; Hanoi Rocks; Mötley Crüe; Twisted Sister; Poison; Cinderella; Skid Row

Pop metal (1978−present)

Quiet Riot; Van Halen; Whitesnake; Def Leppard; Europe; Dokken; Lita Ford; Ratt; Guns N' Roses; Winger; Warrant; Doro; The Darkness

Stoner metal (1982−present)

Witchfinder General; Trouble; Candlemass; Cathedral; Kyuss; Today Is the Day

Original hardcore (1980−1986)

Agnostic Front; D.O.A.; The Exploited; Bad Brains; Misfits; GBH; Discharge; Dead Kennedys; Minor Threat; Black Flag

Thrash metal (1983−present)

Metallica; Slayer; Anthrax; Megadeth; Exodus; Overkill; Kreator; Destruction; Sodom; Testament; Nuclear Assault; Death Angel; Pantera; Sepultura; Children of Bodom

First wave of black metal (1981−1986)

Venom; Bathory; Mercyful Fate; Celtic Frost

Norwegian black metal (1990−present)

Mayhem; Darkthrone; Immortal; Gorgoroth; Emperor; Satyricon; Enslaved; Dimmu Borgir; Cradle of Filth (actually from UK)

Grindcore (1987−present)

Napalm Death; Carcass; Repulsion; Exhumed; Extreme Noise Terror; Cephalic Carnage; Brutal Truth

Death metal (1985−present)

Possessed; Death; Morbid Angel; Obituary; Deicide; Cannibal Corpse; Immolation; Autopsy; Nile; Dying Fetus

Swedish death metal (1990−present)

Grave; Entombed; At the Gates; Unleashed; Dismember; Arch Enemy; Soilwork; In Flames; Dark Tranquillity; The Haunted

Goth metal (aka Doom metal on the DVD) (1990−present)

Paradise Lost; Tiamat; Therion; Type O Negative; My Dying Bride; Anathema; Theatre of Tragedy; Opeth

Metalcore (1985−present)

Corrosion of Conformity; Suicidal Tendencies; Dirty Rotten Imbeciles; Machine Head; Stormtroopers of Death; Hatebreed; The Dillinger Escape Plan

Grunge (1988−1994)

Green River; The Melvins; Soundgarden; Mudhoney; Nirvana; Alice in Chains; Mother Love Bone; Stone Temple Pilots; Pearl Jam

Industrial metal (1988−present)

Ministry; White Zombie; Godflesh; Nine Inch Nails; Fear Factory; Marilyn Manson; Static-X

Hard alternative (1985−present)

Faith No More; Jane's Addiction; Prong; Living Colour; The Smashing Pumpkins; Rage Against the Machine; Tool

Nu metal (1994−present)

KoЯn; Biohazard; Limp Bizkit; Slipknot; Godsmack; Coal Chamber; System of a Down; Disturbed; Kittie

New Wave of American Metal (2000−present)

Shadows Fall; Lamb of God; Darkest Hour; Killswitch Engage; Unearth; God Forbid

Metal Archives Blind Guardian

The Spirit Of Rock (and The Spirit Of Metal)

http://www.spirit-of-rock.com/

metal archives eh?. You will find a lot of bands here as well as reviews for the albums.

www.metal-archives.com/