The Rutles

Just like the real Beatles, this long-running parody act only has two original members left: Neil Innes ('Ron Nasty') and John Halsey ('Barry Wom'). They're best known for being featured in Eric Idle's 1978 mockumentary 'All You Need Is Cash', but they've actually got a fairly meaty discography of almost-but-not-quite-covers to play from, bolstered by some songs from Innes's career with other groups including the Bonzo Dog Doo-Dah Band.