- 1 Omar Courtz
- 2 ODIE
- 3 Oskar
- 4 OMB Peezy
- 5 Old Sea Brigade
- 6 Ovylarock
- 7 Oxlade
- 8 Ola Kvernberg
- 9 Oh No
- 10 Olli Banjo
- 11 Ookay
- 12 Orjan Nilsen
- 13 Oliver Malcolm
- 14 Ovi
- 15 Oscar Peterson
- 16 Otto Klemperer
- 17 Octavio
- 18 Odd Language
- 19 Oliverse
- 20 One True God
- 21 Owen Norton
- 22 ORF Symphony Orchestra
- 23 Orkest de Volharding
- 24 Oğuzhan Koç
- 25 Ola Gjeilo
- 26 OSHI
- 27 Otis Spann
- 28 O.T. Genasis
- 29 Oliver Green
- 30 Omari Hardwick