The always fantastic Gary Oldman in Francis Ford Coppola's 1992 version of Bram Stoker's Dracula, one of Victorian Britain's classic Gothic novels. If you're crunched for time, start watching this clip from the 2:45 minute mark. To compare Oldman's acting with painful to watch acting, continue watching after the opening scene to where Keanu Reeves begins to "act."
Begin at the 4:04 minute mark. That laugh...Most disturbing laugh ever recorded in film.