I have to speak in defense of Yoko Ono. First, the “let it be” documentary seems to me to communicate clearly that the dissolution of the Beatles is far more complicated than any assignation of responsibility to only one or another of the band mates. Second, Yoko made some compelling music. I think her three albums from the early to mid 70s are excellent and essential listening. Several subsequent recordings also deserve attention.
Now, perfect songs. I love a lot of the previous suggestions. Here are several I think deserve mention as well:
Nilsson, Driving Along
Zombies, Tell Her No
Bob Seger, Heavy Music; East Side Story
Van Morrison, Madame George
Jazz Butcher, Sweet Water
Kinks, Well Respected Man
Nico, These Days
Thunderclap Newman, Something in the Air
Miles Davis, In a Silent Way