| 554. Roger Eno | Composer, Piano | 1 |
| 554. Roger Lewis | Baritone Sax | 1 |
| 554. Roger Tallroth | 12-String Guitar | 1 |
| 554. Rogerst Charles | Saxophone | 1 |
| 554. Rogest "Roscoe" Carstarphen | Keys | 1 |
| 554. Rogét Chahayed | Keys | 1 |
| 554. Rohin Khemani | Percussion | 1 |
| 554. Rokia Traoré | Featured Artist | 1 |
| 554. Rolando "Phanso" Wilson | Drums | 1 |
| 554. Rolando Morales-Matos | Percussion | 1 |
| 554. Rollum Haas | Drum Machine | 1 |
| 554. Roma Baran | Audio, Synthesizer | 1 |
| 554. Romano DiNillo | Bodhran, Cajon | 1 |
| 554. Romier Mendez | Bass | 1 |
| 554. Rommel Ribeiro | Guitar | 1 |
| 554. Román Diaz | Bongos, Cowbell | 1 |
| 554. Ron Allen | Bass | 1 |
| 554. Ron Carter | Bass | 1 |
| 554. Ron Gilmore | Keys, Vocals | 1 |
| 554. Ron Mael | Keyboards | 1 |
| 554. Ron Poindexter | Vocals | 1 |
| 554. Ron Tnava Avant | Keys, Vocals | 1 |
| 554. Rona Siddiqui | Keys, Music Direction | 1 |
| 554. Ronald Bruner Jr. | Drums | 1 |
| 554. Ronald Isley | Vocals | 1 |