I must admit, if I was offered Chuck Berry and Dave Gilmour in an either-or "Desert Island Discs" type of situation, personally I'd have to pick the Chuck Berry as well. More for the songs than the guitar playing I guess, but it would still be Chuck.
BTW it was Malcolm Young, in an interview back in the early 80s, who forced me to actually buy some Chuck Berry to check out what the fuss was about. Apparently he went to the "old guys" on Keef's recommendation, and same as me couldn't see hear it at first. MY's recommendation in the interview was listen real hard, it's where everything came from... and he was right!