Apart from all the truly innovative, and downright entertaining, work he gave us himself if it hadn't been for him so many of us would've remained ignorant of the Velvets, Stooges, Mott, Jacques Brel etc. etc. His influence on us Liverpool kids of the 1970s can't be overstated. We all, boys and girls, both, wanted to be like him.
Here's a recently rediscovered performance of The Jean Genie from a 1973 episode of Top of the Pops. LIVE, remember, not mimed. Outstanding.
https://www.youtube.com/watch?v=yEmGQYCuc6M