Oceanship
alternative rock, ambient, piano rock, rock
Oceansize
alternative rock, post-rock, progressive rock
Ochre
ambient, electronic, electronica, idm
Octave One
detroit techno, electronic, house, techno
Octavia Sperati
doom metal, gothic metal, metal
October Falls
black metal, neofolk, folk
October File
industrial metal, post-hardcore
October Project
progressive rock, rock, folk
October Tide
death metal, doom metal, melodic death metal
Odd Crew
groove metal, metal, sludge metal
Odd Project
emocore, metalcore, post-hardcore, screamo
Odem
black metal, blackened death metal, death metal
Odessa
melodic hardcore, metalcore, post-punk
Odesza
ambient, chillwave, electronic, electronica
Odhinn
black metal, folk metal, metal, viking metal
Odium
black metal, melodic death metal, symphonic black metal
