None of the above. Very limited as a writer, only managed second-rate R&R/R&B or sickly schmaltz (like Imagine/Beautiful Boy/Woman or that god-awful Christmas dirge). I always thought he was the least talented Beatle (apart from Starkey) BUT (and it's a H-U-G-E but!) his voice was THE sound of the Beatles and without him they'd never have received the recognition they did.
IMNSHO.
S:0)