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ARTIST NAMECOUNTRYGENRE
O.M.S.F.United StatesFolk Metal
O.P.M.C.NetherlandsProgressive Rock
O’Donnell, JoeIrelandJazz Prog
O’Hara, WittoxCanadaJazz Prog, Avant-Gard/Experimental
Oak, Ash & ThornUnited StatesFolk Metal
OakenshieldUnited KingdomFolk Metal
OaksenhamArmeniaSymphonic Prog
OberegCzechiaFolk Metal
OblivionUnited StatesFolk Metal
OcarinahFranceProgressive Rock
OceanGermanyProgressive Rock
Ocean SoulBrazilPower Metal
OctoberUnited StatesSymphonic Prog
OctohperaBrazilSymphonic Prog
OctopusGermanySymphonic Prog
OctopusNorwayProgressive Rock
OctopusUnited StatesPsychedelic Rock
OdinJapanPower Metal
OdinMultiProgressive Rock
Odin’s EyeSwedenFolk Metal, Power Metal
OdisseaArgentinaPower Metal
OdisseaItalyRock Progressivo Italiano
OdraedirCzechiaFolk Metal
OdysseaItalyPower Metal
Officina MeccanicaItalyRock Progressivo Italiano
Olympos MonsFinlandPower Metal
OmaïnenFrancePower Metal
OmenUnited StatesPower Metal
OperaItalyRock Progressivo Italiano, Folk Prog
Opera PuffItalyFolk Prog
Opus AvantraItalyAvant-Gard/Experimental, Rock Progressivo Italiano
Ore Di Punta, LeItalyRock Progressivo Italiano
OrganaFolk Metal
Orgulho PagãoBrazilFolk Metal
Orme, LeItalyRock Progressivo Italiano
Osage TribeItalyRock Progressivo Italiano
OsannaItalyRock Progressivo Italiano

Author: Jacopo Vigezzi

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