I'd say the Master.
Well the Daleks areeee sort of, but the Master is so........devious. So evil. So the opposite of the Doctor (or rather, a two sides of the same coin Batman-Joker thing going on there).
Well the Daleks areeee sort of, but the Master is so........devious. So evil. So the opposite of the Doctor (or rather, a two sides of the same coin Batman-Joker thing going on there).