| Ol Kainry |
12 |
| OnlyOne |
3 |
| Ofelia K |
4 |
| Ole Ivars |
5 |
| OSHUN |
7 |
| Ol Kainry and Dany Dan |
8 |
| Obie Trice feat. Eminem |
3 |
| Orelsan |
22 |
| Obie Trice feat. Nate Dogg |
3 |
| O.G. Ron C & Bro. Wood |
6 |
| Obskure Torture |
3 |
| Obiwon |
3 |
| O.G. Spanish Fly |
3 |
| Obojeni Program |
4 |
| Oberhofer |
22 |
| Ocean Carolina |
8 |
| Odd Couple |
8 |
| Ocelot Robot |
3 |
| Oceanship |
6 |
| O.T. Genasis |
3 |
| Obscura Religio |
4 |
| Octopus (Pop - UK) |
5 |
| Oblivion |
16 |
| October Crisis |
5 |
| ODESZA |
7 |
| Odd Future |
33 |
| Oddzial Zamkniety |
3 |
| Odd Squad |
5 |
| Of Flight & Failure |
5 |
| Odame |
3 |
| Odezenne |
4 |
| Oebeler Kinderkoor |
6 |
| Off Broadway |
9 |
| Odeurs |
6 |
| Ofishal |
13 |
| Odins ÄNglar |
13 |
| Ocho Nuevo |
3 |
| Oh, Clemency |
6 |
| Odd Fog |
4 |
| Oh My! |
3 |
| OG Maco |
7 |
| Oh No Scenario |
7 |
| Oh No Fiasco |
3 |
| Oh Romeo |
4 |
| Og Boo Dirty |
3 |
| Onkel Kånkel |
38 |
| Old Dogs |
3 |
| Omp |
9 |
| Only Seven Left |
22 |
| Ogre You Asshole |
3 |
| One Dead Three Wounded |
8 |
| Olu |
8 |
| Omnitron |
9 |
| Omaira Falcon |
4 |
| Orgi-E |
8 |
| Omar A. Rodríguez-López |
3 |
| One Cross |
16 |
| Olli P. |
3 |
| Originoo Gunn Clappaz |
27 |
| One Way (Korean) |
16 |
| Oli P |
11 |
| Original London Cast |
7 |
| One Two |
6 |
| Olle Adolphson |
3 |
| Olmeca |
8 |
| Organized Konfusion |
39 |
| Omw |
8 |
| Oliver Trolley |
11 |
| Oneohtrix Point Never |
6 |
| Orgasmic & Fuzati |
6 |
| Off My Rocker |
10 |
| Oscar Brown Jr. |
5 |
| Opio |
17 |
| Omar Geles |
4 |
| Oscar Chávez |
3 |
| Orquesta Aragon |
3 |
| Ossler |
9 |
| Omar Trampe |
3 |
| Oun-P |
7 |
| Omar & The Howlers |
8 |
| Oro Norteno |
3 |
| Okoumé |
3 |
| Olle Ljungström |
34 |
| Oscar D'Leon |
6 |
| One Way Out |
3 |
| OutwiT |
5 |
| One Block Radius |
9 |
| Owen Campbell |
4 |
| Olexesh |
8 |
| Omg Girlz |
12 |
| Omar Linx |
3 |
| One Night Stand In North Dakota |
9 |
| Opgezwolle |
39 |
| Oldelaf |
17 |
| Orquesta Guayacan |
6 |
| Organ |
8 |
| Outerspace |
8 |
| Old Major |
10 |
| Opus Pro |
7 |
| Ottawan |
13 |