James Nesbitt was the lead in Dr. Jekyll & Mr. Hyde.
What about Richard Hurndall? Who played the first doctor in the story The Five Doctors, because William Hartnell died in 1975, and Hurndall bore a passing resemblance to Hartnell. imdb.com lists PAUL McGann and up to David Tennant as the 10th Doctor, but Peter Cushing is listed as being the inventor of the T.A.R.D.I.S. Both Dr. Who and the Daleks and Invasion Earth: 2150 A.D. are based on the Doctor Who stories.
Or, is that complicating thins too much.