I can't put my limit to 10 band because there are so many bands but...
PanterA
Death
Slayer
MetallicA
Iron Maiden
ImmortaL
Burzum
Ozzy Osbourne
Judas Priest
Children of Bodom
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Honorable mentions
Destruction
ObituarY
MayheM
Anthrax
MegadetH
Morbid Angel...