His 'Live In Concert' (his first concert film from 1979) is probably the greatest performance I have ever seen (unfortunately, I didn't see it live. It's still available on DVD). We have a lost a truly great, great artist (even though he had been sick for years with MS, and was not really performing very much.)
A beautiful quote of his is from an old CBS news interview. When asked about the profanities in his routines, he responded, "What I find obscene is the President killing the people of South America in the name of fighting Communism".