There is always a downside with subtitles, it's a shame as most of the best horror movies are foreign language. So probably count out Cabinet and Let The Right One In as well
Other ideas, in english
:
Peeping Tom - this one's twisted to the core and has a unique pov
Repulsion - (can't believe i forgot this) not so scary, but really creepy and psychological
Neon Demon - not strictly horror, but very few films creeped me out as much as this one