Thank you Alfie! Can't think of who's done the three, i.e solo, sidecar driver,AND passenger. However, just off the top of my head, those who have done solo and sidecar, include:
Freddie Dixon, Florian Camathias, Eric Oliver, Mick Boddice, Graham Walker, Chris Walker, Chris Vincent, Nigel Rollason, Colin Appleyard, Maria Costello, Michael Dunlop.....I am sure there are a load more out there, if you are just talking about racing generally, and not the TT.

I can think of one famous rider who also passengered, and that was Jimmy Simpson in the 1920s.
I will have to have a think about this one.