Paul's gem is 'McCartney'.
It's the one closest to the 60s (some of it was even recorded in the 60s), avoids the increasingly stodgy early 1970's production of 'All Things Must Pass' and 'Plastic Ono Band', and, as such, pretty much anything on it wouldn't sound out of place on the 'White Album'.
It also has a fabulous cover, wonderful photographs, and was released at a time (just) when vinyl LPs in Britain were still beautifully made.
If it had been made by an unknown (Nick Drake, Rodriguez, Anne Briggs etc.), on a desirable label (Harvest, Island, Deram, or even Apple!), in 1970, and not sold a bean, it would now been attracting bids of £3,000 on eBay, and wouldn't be viewed as just another 'Beatles solo' LP.