5 Days in Greece with older parents?

This is a bucket list trip for my whole family that I want to make happen. My dad (76) loves history, ruins, museums, fully mobile but not tremendous stamina; my mom (67) slightly diminished mobility but no mobility assistance required, into food, wine, and beaches; me(40) into all of the above.

My parents don't really have any overlap in their interests so ideally the location we go to is easy enough to traverse solo for when I'm doing an outing with one and not the other so they can do something other than nap lol

I've been looking at various destinations and was wondering if anyone had insight or recommendations that would hit a sweet spot. Santorini, Crete, and Athens were the locations I was eyeing but I don't want to overlook someplace amazing.

Author: doozer917