The Oscar winner is about a man who thinks he's applying for a job at a travel agency when he ends up getting one preparing the dead for the afterlife. It's beautifully shot and acted. (Even though the 4 Ways a Best Picture gents didn't love it as much as I did)
2) Battle Royale
The idea of this film IS horrifying, but I wouldn't call it a horror movie. It's about as much of one as the Hunger Games is, only this is gorier. Middle schoolers getting dropped on an island to fight to the death, it's so twisted.*
Oldboy is the example I always use when I try to argue the cases of dubs ruining films. When I first watched Oldboy, it was the English dub, and I thought it was terrible. The lead actor's speaking voice and "thinking" voice were different and took me out of the moment. Then Netflix finally got the subtitled version and it was like watching an entirely different film.
* And if Battle Royale is too horror-y, then my bonus pick is Spirited Away