Paul and John were opposite ends of the spectrum, and they balanced one another so perfectly that it made the band truly great. It was that ying and yang...sugar and salt, light and dark. They were perfect as a team. When they split, so did the magic.
Re: “They were perfect as a team. When they split, so did the magic.”
I gotta agree with you. They had a competitive relationship which, as you pointed out, produced some wonderful music. Of course George Martin’s influence nourished their creativity too.
Paul briefly teamed with Elvis Costello, which had a similar kind of mix. They co-wrote "Veronica" which IMHO may have been one of Macca's best Post-Beatles songs.