Rubber Soul is indeed very acoustic.

There is a John Lennon Acoustic album, released a few of years back, that showcases a lot of his later solo work in very pleasant stripped back arranggments. I think the source of quite a bit of it was demos, although songs like his version of Working Class Hero were always pretty sparsely arranged anyway.

Let It Be was also much improved when Yoko Lennon-Carthy relented and let Paul Waterson-McCartney remove the worst of the Phil Spector excesses to produce Let It Be Naked.