- 1 Owsey
- 2 Omar Noir
- 3 Oliver Green
- 4 OMB Peezy
- 5 Omar Naber
- 6 Octavio
- 7 Open Mike Eagle
- 8 Olli Banjo
- 9 Obie Trice
- 10 Omari Hardwick
- 11 Offer Nissim
- 12 O.T. Genasis
- 13 Odetari
- 14 Oscar Peterson
- 15 Ohana Bam
- 16 OG Maco
- 17 ONNT3X
- 18 Otis Spann
- 19 Ozo
- 20 Ovi
- 21 Oter
- 22 Omar Hakim
- 23 OmenXIII
- 24 Ola Gjeilo
- 25 Overload
- 26 OMFG
- 27 Obadiah Brown-Beach
- 28 Owen Jones
- 29 Oskar
- 30 Omiki