OK, so the websites seem to often say actors. i imagine it is hard to type actors well as we normally see them in an acting capacity playing someone else!
Stolen from one website here are their suggestions for ISTP celebs:
James Bond (Casino Royale)
Connor MacLeod (Highlander)
Jean Valjean (Les Miserables)
Willie (Bad Santa)
Travis Bickle (Taxi Driver)
Anyone got any comments or other suggestions? Or any females?!!! Or are the female ISTP's busy being self destructive riding motorbikes and doing drugs to become famous? Angelina Jolie anyone?