Derrick McKenzie has been their long time drummer so I know and recognize him. Stuart Zender (former bassist) is well known in the bass community as a fantastic bass player and is credited for the memorable bass lines he contributed. Paul Turner as well for taking over the reins splendidly. Simon Bartholomew (former guitarist) is better known as the guitarist for the equally legendary acid-jazz group Brand New Heavies.

Those are what I know from the top of my head. A lot of the musicians who played in Jamiroquai are legends in their own right.