- 1 ObulKasim-Omar
- 2 oxygen
- 3 Ombre2Choc Nation
- 4 OSAD
- 5 OneMusic Record
- 6 Oh Yeonju (153/Joombas)
- 7 Ori Kaplan
- 8 Otro Nivel
- 9 Olbaid
- 10 OTO
- 11 Om Voices
- 12 Oliver Mtukudzi
- 13 Oxford Camerata
- 14 Out Of Order
- 15 Ovhi Firsty
- 16 Orezi
- 17 Ogie Alcasid
- 18 Oddkidout
- 19 OZMO
- 20 Omer Adam
- 21 Ozan Koçer
- 22 Omaha
- 23 Ocean Sounds
- 24 ODUCHU
- 25 Oscar Pettiford
- 26 Omar S
- 27 one
- 28 Olives
- 29 OmO
- 30 oui