'Rubber Soul' is fairly baroque and might have influenced the baroque elements in Pet Sounds.
The whole folk boom in UK and US circa 1962-65 has to have been influenced by baroque to some degree, simply because British folk harks back to the pre-industrial/pastoral past so heavily. Nick got that via people like Davy Graham. Brian would say he wasn't a folkie but he must have been aware of Peter, Paul and Mary, early Dylan, Judy Collins, etc.
Judy did a very nice version of In My Life around that time:
http://www.youtube.com/watch?v=xXIfP-EJx2M&feature=related