3. Patrick Troughton (Second Doctor)
Arguably the most influential of all the Doctors, Patrick Troughton’s incarnation has been cited as the favorite Doctor of Neil Gaiman, Matt Smith, Peter Davison, and Colin Baker. His eccentric take on the character really defined the role for the future. Unfortunately, the majority of the work he did with Doctor Who has been lost, but that which remain shows how really masterful he was in a role. The Eleventh Doctor wouldn’t be what he is without the influence of Troughton.