The fabs needed each other, without each other they weren't fab.
Well, no-one is perfect... Still, all ex-Beatles left a musical-print in the 70's to me. When I was a kid, I truly enjoyed the Wings, which were often heard on our radio-station. "Imagine" became meanwhile a worldwide classic, so did "Happy X-Mas" by John, which I just heard this afternoon. George's "My sweet Lord" is well-known, besides his concert for Bangladesh. Ringo was the first ex-Beatle to have a number one hit in the Billboard's with "Photograph". On the whole, they did pretty good on their own and I do enjoy their solo-stuff, although not as much as the Beatles.
They were extraordinary as a band, but every one remains "fab" to me even after the split of the Beatles. Two of them are still active musically and who knows how it would have been, if John and George were still alive.