Odd is it is, I have made a couple of comparisons between Paul McCartney and Kelsey Grammar's portrayal of Frasier Crane. For example Paul McCartney was very succesful when he was a member of the Beatles, but when he went to Wings he was still succesful but didn't reach the same peak he did when he was a Beatle.
Kelsey Grammar was a very succesful member of Cheers, and although Frasier is considered a better show it wasn't as popular as Cheers. Also toward the end of Cheers Kelsey Grammar had a thick beard, and Paul McCartney also had a thick beard that was very similar toward the end of Cheers.
I've got plenty more but here's another one. The main character of Cheers was Sam Malone (Ted Danson) while the brains for the Beatles were John Lennon. Yet Kelsey Grammar formed his own sitcom and became famous, and Paul McCartney formed his own band and became famous.