To be honest my friend I would play this one by ear. Everything you listed could work brilliantly for the Doctor. Think of your body type. Are you a bigger man? Then make it lumbering and slow. Are you thinner? Smaller? Darting and quick. Aggressive. Compensating for lack of height. This is just the advice from an old Haunt actor. You kind of gotta feel it out as far as movement goes. Its the best way to get a natural sinister feel to your movements. If they are genuine the customers will pickup on that and make it more intense for them.