Dr. Jonathan Crane / The Scarecrow (Cillian Murphy) from Batman Begins (2005). Created by Bill Finger and Bob Kane in World's Finest #3 (1941, DC Comics)
Dr. Hannibal Lecter (Anthony Hopkins) from The Silence of the Lambs (1991). Created by Thomas Harris in the novel Red Dragon (1981).
Dr. Philip K. Decker (David Cronenberg) from Nightbreed (1990). Created by Clive Barker in the novel Cabal (1988).
(P.S. I started reading Cabal last night, which is what brought this on. Nightbreed was one of my favorite movies for many years after it came out. I really ought to watch it again some time…)