Tagged because I'm interested in suggestions too.
For OP.... do you like slashers?
You're Next and High Tension were good slasher movies.
Sinister, REC, Blair Witch Project, and The Ring were some of my favorites.
Another one that is pretty creepy is Dabbe: Bir Cin Vakasi (2012)
There were plenty of sequels but this one and the 2nd one were the best and truly creepy
http://www.imdb.com/title/tt2322420/?ref_=fn_al_tt_6I've been meaning to see The Witch & The Babadook