- 1 ObulKasim-Omar
- 2 oxygen
- 3 OSAD
- 4 OZMO
- 5 Ozan Koçer
- 6 Ombre2Choc Nation
- 7 OneMusic Record
- 8 Ocean Sounds
- 9 Oxford Camerata
- 10 Oddkidout
- 11 Ori Kaplan
- 12 Olbaid
- 13 Om Voices
- 14 Otro Nivel
- 15 OTO
- 16 Ovhi Firsty
- 17 Orezi
- 18 Omer Adam
- 19 ODUCHU
- 20 Oliver Mtukudzi
- 21 Oscar Pettiford
- 22 Omar S
- 23 Out Of Order
- 24 one
- 25 Olives
- 26 OmO
- 27 oui
- 28 Ogie Alcasid
- 29 ONCE
- 30 Osho