Pertwee in Season 7 is probably my favourite characterisation of The Doctor, and the man is a superlative actor.
Pertwee was warm and charismatic, but he was a limited actor, with a very narrow range and not much to show off about his acting "bag of tricks". I remember several instances where he saw gurning as his only option to portray the Doctor getting knocked out, he stroke his chin whenever he was supposed to be puzzled by something, not to mention his lisp and his bizarre, stagy body language. Acting-by-shorthand is what he was doing, and there's nothing superlative about that. I've seen that kind of approach onstage quite frequently, but never by a professional actor.