I agree, Wilson is right up there with Lennon and McCartney. Ironically, he and McCartney were born two days apart.
Another songwriter from the 60's whose chord progressions are sublime is Burt Bacharach. Another great songwriter (especially his 60s stuff with the Impressions) born the same month as McCartney and Wilson, was Curtis Mayfield.
From nowhere through a caravan
Around the campfire light
A lovely woman in motion
With hair as dark as night
Her eyes were like that of a cat in the dark
That hypnotized me with love
Bacharach was indeed a singularly unique composer. As a confirmed music lover, and one who has played several different instruments, I am nonetheless in awe of people who can compose music. To think that man has taken the 13 notes of the octave, and composed hundreds of thousands of songs......