I think you should do a giant list of all the bands, and let escapists post comments favoriting bands/adding more, and keep track of it all with the band name and favorites next to each other - in one massive post.
Anyway, here are some bands I know quickly (I could always dig up more) that I don't think are on your list OP - with ?s for those that are borderline non-metal:
Anyway, here are some bands I know quickly (I could always dig up more) that I don't think are on your list OP - with ?s for those that are borderline non-metal:
Accept
Adema (?)
Alestorm
Almah
Annihilator
Avenged Sevenfold (?)
Blind Guardian
Bullet For My Valentine (?)
The Claymore (Fucking awesome for how obscure the poor bastards are, and yes it's also my favorite anime...)
Dio (?)
Disarmonia Mundi
Disturbed
Dope
Dragonforce
Drowning Pool (?)
Five Finger Death Punch
The Haunted
HIM (?)
In Extremo
In Flames
Killswitch engage
Korn (?)
Korpiklaani
Lamb Of God
Lordi (they try their best)
Manegarm
Murderdolls
Nocturnal Rites
Pantera
Powerman 5000 (?)
Rage
Rob Zombie (?)
Sabaton
Scar Symmetry
Scorpions (?)
Shadows Fall
Shinedown (?)
Skillet (?)
Slipknot
Soil (?)
Soilwork
Sonata Artica
Sonic Syndicate
Spineshank
Static-X
Stratovarius
Thousand Foot Krutch (?)
Trapt (?)
Trivium
Unearth
The UNguided
Waltari
Wolfmother (?)
Adema (?)
Alestorm
Almah
Annihilator
Avenged Sevenfold (?)
Blind Guardian
Bullet For My Valentine (?)
The Claymore (Fucking awesome for how obscure the poor bastards are, and yes it's also my favorite anime...)
Dio (?)
Disarmonia Mundi
Disturbed
Dope
Dragonforce
Drowning Pool (?)
Five Finger Death Punch
The Haunted
HIM (?)
In Extremo
In Flames
Killswitch engage
Korn (?)
Korpiklaani
Lamb Of God
Lordi (they try their best)
Manegarm
Murderdolls
Nocturnal Rites
Pantera
Powerman 5000 (?)
Rage
Rob Zombie (?)
Sabaton
Scar Symmetry
Scorpions (?)
Shadows Fall
Shinedown (?)
Skillet (?)
Slipknot
Soil (?)
Soilwork
Sonata Artica
Sonic Syndicate
Spineshank
Static-X
Stratovarius
Thousand Foot Krutch (?)
Trapt (?)
Trivium
Unearth
The UNguided
Waltari
Wolfmother (?)