- 1 Owsey
- 2 Oskar
- 3 Omar Bashir
- 4 OMB Peezy
- 5 Octavio
- 6 OranG小橙小橙
- 7 OMAR
- 8 Ozo
- 9 Olivier Giacomotto
- 10 Olly Alexander
- 11 Osmo Ikonen
- 12 Olli Banjo
- 13 Ovi
- 14 Olivier Messiaen
- 15 Oxlade
- 16 Offer Nissim
- 17 Outlaw The Artist
- 18 Odetari
- 19 Oliver Nelson
- 20 Oscar Peterson
- 21 Omari Hardwick
- 22 OSHI
- 23 Ornette Coleman
- 24 Ol' Dirty Bastard
- 25 OhGeesy
- 26 OJAX
- 27 Omar Noir
- 28 Oyster
- 29 Oliver Green
- 30 Octagen