List of bands (15):

Halestorm
Halocene
Hammerfall
Hariot
Harlott
Hatebreed
Hatriot
Haunt
Havok
Hazzerd
Heathen
Heaven Shall Burn
Heidevolk
Helloween
Heriot
Hideous Divinity
High On Fire
Hoax Of Upsala
Hollywood Undead
I Built The Sky