The few horror movies I've see are always either scary or what I call "disturbing scary", 3 that fit in that category are:
1) Drag Me To Hell- saw this at one time, never watched it again, couldn't handle the gory parts.
2) Halloween remake- The beginning was so disturbing, just thinking a kid could do that, ugh *shudders*, the movie went downhill after he grew up.
3) Black Swan- this definetly falls under the "disturbing scary" category. One of the most disturbing was her peeling the skin off her finger. That one really made me cringe.