Best Who stories to showcase each Doctor?

Talking with attimes_bracing about last night's Doctor Who I noted that Capaldi seems to be consciously channeling some of the actors who played the earliest incarnations of the character, in particular William Hartnell and Jon Pertwee. She asked what would be the best (surviving) stories from each Doctor to showcase the relevant actors' interpretations of the role; since I'm only really familiar with Who from Tom Baker onwards, I thought I'd invite suggestions.

(She's seen Genesis of the Daleks, which is often cited as classic Tom Baker but was very, very early in the role for him, and City of Death, which was nearer the end of his time. What else is seen as really good, and representative, Fourth Doctor? The Talons of Weng-Chiang, if you can overlook the yellowface casting and the awful Giant Rats?)