Garfield Minus Garfield is a concept comic by Dan Walsh in which Garfield (the character) is removed from the strip, revealing Jon Arbuckle’s troubled inner life – his paranoia, loneliness and existential angst. The comics are alternately bizarre, hilarious and thought-provoking. The sampling provided here doesn’t really do it justice; click on the strips for more.
There is also the opposite:
http://garfieldminusarbuckle.blogspot.com/
Nice!