Orchestra Harlow
funk, latin jazz, salsa
Orchid
doom metal, screamo
Orcus Chylde
doom metal, psychedelic rock, rock, stoner rock
Ordained Fate
christian metal, heavy metal, thrash metal
Orden Ogan
folk metal, power metal, progressive metal
Order Of Ennead
black metal, blackened death metal, death metal, metal
Ordinance
black metal, death metal, progressive death metal, technical death metal
Ordo Equilibrio
dark ambient, martial industrial, neofolk
Ordo Equitum Solis
dark ambient, neofolk
Ordo Funebris
dark ambient, neoclassical, neofolk
Ordo Rosarius Equilibrio
dark ambient, martial industrial, neofolk
Ordog
black metal, doom metal, funeral doom
Oregon Bike Trails
indie pop, indie rock, pop
Orelipoiss
lo-fi, singer-songwriter
Oren Lavie
singer-songwriter, folk
Orenda Fink
singer-songwriter
Organ Thieves
folk rock, hard rock, heavy metal, reggae, southern rock
Organic Audio
chillout, electronic, electronica, trip-hop
organic stereo
ambient, electronic, post-rock, folk
Organised Grime
dubstep, grime
Organissimo
jazz, jazz-funk
Organized Chaos
progressive metal, punk rock
Orgone
afrobeat, death metal, funk, soul, technical death metal
Orgy
industrial rock, metal, rock
Orianthi
pop, pop rock, rock
Óriás
alternative rock, rock
Orichalcum
goa, goa trance, psychedelic trance
Origin
brutal death metal, death metal, grindcore, technical death metal
Original Dixieland Jazz Band
dixieland, dixieland jazz, jazz
Original Mirrors
new wave, post-punk
Original Naabtal Duo
schlager, volksmusik
Original Sin
black metal, drum and bass, speed metal
Orion Rigel Dommisse
indie folk, new weird america, singer-songwriter, folk
Orion the Hunter
hard rock, rock
Orion Too
dance, eurodance, trance
Orion's Reign
metal, power metal
Orjan Nilsen
melodic trance, progressive trance, tech trance, trance, uplifting trance
