Page is the most overrated only because too many people think he should be on the same level as Clapton and Hendrix. However, in studio recordings, Page was a very proficient guitarist, not a GREAT one, and he wasn't a great live performer. There are numerous popular guitarists who didn't have the proficiency of Page, yet he's the only one I can think of that was billed far above his actual talent level.
George Harrison wasn't as talented in straight proficiency as Page, for example, but hardly anyone says that George was a "great" guitarist.