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