First appearance: American Psycho (2000)
A wealthy businessman in the '80s lives a double life. By day he's a wealthy investment banker. By night he dresses as a bat and fights crime. No, sorry got this one confused with another movie. By night the investment banker enjoys murdering people, but because it's the 1980s and everyone is a fake nobody notices nor believes he's a serial killer.
Interesting that this actor played both Patrick Bateman and the vigilante Batman. Bateman, Batman, weird, isn't it?