I remember a McGuinn interview on some PBS program where he talked about the influence of Coltrane but I couldn't find that. Here it is at least mentioned in the notes.
https://www.youtube.com/watch?v=yanXhomzFd8
There has been a fair bit of jazz influence on rock, Joni Mitchell, Jeff Beck, even Brian Wilson (The Four Freshmen influenced his love for harmony singing) are just a few examples.

