With his thick-framed glasses, wide-eyed expression and scrawny stature, Rick Moranis was the perfect actor to play a put-upon nerd. In the 1984 film Ghostbusters, Moranis plays Louis Tully, an accountant (of course) who brags about bargain-hunting and has an unrequited (of course) crush on his neighbor Dana. Even when possessed by an ancient demon, Louis still seems pretty easy to beat up. So much for the Keymaster.