The First Doctor

Exactly what it says on the tin. Before this chap, there was no Doctor. William Hartnell first portrayed The Doctor in 1963 as sometimes jovial, occasionally curmodgeon, super clever elderly gentleman who would sometimes stray into the territory of bumbly Mr Magoo. He travelled around space and time with his granddaughter, then dumped her in post-apocalyptic London and went off on more adventures on which he solicited the company of a number of surrogate granddaughters. What a dude!