| Musician | Appearances |
|---|---|
| Robert Fripp | 23 albums |
| Bill Bruford | 14 albums |
| Adrian Belew | 11 albums |
| Tony Levin | 8 albums |
| Trey Gunn | 7 albums |
| Pat Mastelotto | 7 albums |
| David Cross | 6 albums |
| John Wetton | 6 albums |
| Mel Collins | 5 albums |
| Mark Charig | 3 albums |
| Michael Giles | 3 albums |
| Greg Lake | 3 albums |
| Ian McDonald | 3 albums |
| Robin Miller | 3 albums |
| Keith Tippett | 3 albums |
| Boz Burrell | 2 albums |
| Gordon Haskell | 2 albums |
| Ian Wallace | 2 albums |
| Jon Anderson | 1 album |
| Nick Evans | 1 album |
| Peter Giles | 1 album |
| Eddie Jobson | 1 album |
| Paulina Lucas | 1 album |
| Andy McCulloch | 1 album |
| Harry Miller | 1 album |
| Jamie Muir | 1 album |
| Peter Sinfield | 1 album |