
in ordine cronologico io gli risponderei così:
1970 - black sabbath - black sabbath (le basi del genere)
1976 - sad wings of destiny - judas priest (heavy metal)
1983 - kill'em all - metallica (thrash metal)
1984 - bathory - bathory (black metal)
1985 - seven churches - possessed (death metal)
1987 - scum - napalm death (grindcore)
1987 - keeper of the seven keys pt. 1 - helloween (power metal)
1988 - the land of rape and honey - ministry (industrial metal)
1994 - korn - korn (nu metal)
2001 - jane doe - converge (metalcore)