| Artist | Active | Genre & Styles |
|---|---|---|
| Ish | 1980s | Pop/Rock |
| Ish Ledesma | Pop/Rock | |
| Janusz Olejniczak | 1970s - 2020s | Classical, Keyboard, Concerto |
| John Otoway | 1970s - 2000s | Comedy/Spoken, Comedy, Music Comedy |
| John Otway | 1960s - 2020s | Pop/Rock, Punk, Punk/New Wave, Folk-Rock, Psychedelic/Garage, Pub Rock |