All have been English except Sylvester McCoy, David Tennant, and Peter Capaldi who are Scottish.
Irish, Australian, and English
Out of all the actors who have played Doctor Who only 3 of them have died. Those 3 are: William Hartnell, Patrick Troughton and Jon Pertwee.
Sylvester McCoy, the Seventh Doctor, and David Tennant, the Tenth Doctor, are the only Scottish actors to have "officially" played the Doctor, though many companions and side-characters have been Scottish. UPDATE: As of 2014, Peter Capaldi has taken on the role of the Twelfth Doctor becoming the third Scottish actor to "officially" play the Doctor.
Which ones- do you mean just the actors who played The Doctor, or are you including his companions and other major stars from the series? You need to try and narrow down your question before it can be answered.
There has been 13 actors who has played the role of the Doctor on Doctor Who. Also Peter Capaldi, who is currently playing the Doctor, is also the new 1st Doctor of the new 12 count regeneration cycle.
ALL nationalities can be found here
There have been two Scottish actors who have played the role of Doctor Who: David Tennant, who played the Tenth Doctor, and Peter Capaldi, who played the Twelfth Doctor. Both actors brought their own unique charm and style to the iconic character.
Soviet of Nationalities ended in 1991.
Soviet of Nationalities was created in 1938.
Ken Tyllssen has: Played Dalek in "Doctor Who" in 1963. Played 1st Sensorite in "Doctor Who" in 1963. Played First Sensorite in "Doctor Who" in 1963. Played Mechonoid in "Doctor Who" in 1963. Played First Scientist in "Doctor Who" in 1963. Played Mechanoid in "Doctor Who" in 1963. Played Assistant in "Doctor in the House" in 1969.
There are Dr. Kildare's with different first names. 1937: Joel McCrea 1938, 1939, 1940, 1941: Samuel S. Hinds 1938, 1939, 1940, 1941, 1942: Lew Ayres 1961, 1963, 1966: Richard Chamberlain 1972, 1973: Mark Jenkins
Barney Lawrence has: Played Android in "Doctor Who" in 1963. Played Royal Servant in "Doctor Who" in 1963. Played Guard in "Doctor Who" in 1963. Played Foster in "Doctor Who" in 1963. Played Seabase Guard in "Doctor Who" in 1963. Played Marshman in "Doctor Who" in 1963. Played Sailor on the Shadow in "Doctor Who" in 1963. Played 2nd Kinda Hostage in "Doctor Who" in 1963. Played Dave Culshaw in "Doctor Who" in 1963. Played Guard in "Blakes 7" in 1978. Played Federation Trooper in "Blakes 7" in 1978.