Mickey Rooney in Breakfast at Tiffany's Bronson Pinchot (Serge) in Beverly Hills Cop Long Duk Dong in 16 Candles The nuns in Airplane Ben Stein as the teacher in Ferris Bueller's Day Off Pizza the Hut in Spaceballs The stapler dude in Office Space Bill Duke as Mac in Predator Ned from Groundhog Day The Gas Station Owner that calls heads with Javier Bardem in No Country For Old Men. Great scene.
I suppose some of these could be considered a tad more than minor, but oh well.
Out of nowhere, I can only recall that http://www.imdb.com/name/nm0001518/ in Clint Eastwood's http://www.imdb.com/title/tt0107206/. Also, I didn't do any research on The Dark Knight prior of watching it (not even the trailer), he was pretty cool until he became http://www.imdb.com/character/ch0081880/.