Like Carol Cleveland, Neil Innes also became an unofficial member of Monty Python, contributing music to the Flying Circus and several Python LPs, as well as making a very memorable impression as Sir Robin's personal minstrel in Monty Python and the Holy Grail.
Perhaps the biggest showcase for Neil Innes's multi-talents is The Rutles, his and Eric Idle's spot-on Beatles parody-homage (or parmage, which is also a French cheese). Innes and Idle co-wrote the 1978 mockumentary All You Need is Cash, while Innes took over completely for its soundtrack which parodied more than a dozen Beatles classics while also being a very good listen on a purely musical level. Innes's Lennon impersonation as Ron Nasty is uncanny both on screen and on vinyl.
While The Rutles project was arguably the peak of Innes's career, he remained a very active entertainer through the years, reviving his most celebrated project for 1996's Anthology-parody The Rutles: Archaeology and forming The Idiot Bastard Band with fellow British-comedy luminary Adrian Edmondson and some other guys. Sadly, Neil Innes died at the age of 75 this past December 29. His death was reportedly "unexpected." I'll miss the idiot bastard.