Not previously mentioned - Night of the Hunter directed by Charles Laughton with Robert Mitchum as his most villainous, also Wizard of Oz, Destry Rides Again, To Have and Have Not, For Whom the Bell Tolls, the first Pink Panther and many of its sequels.
Other favorites already mentioned - Casablanca, African Queen, Kind Hearts and Coronets, Arsenic and Old Lace, Dr. Zhivago, Henry V, Richard III, It Happened One Night, Man For All Seasons, Rear Window, The Gods Must Be Crazy