Well, in my opinion I'd have to say 13 Ghosts (When I woke up from my nightmare..I could of swore I saw the Jackal,but of course it was just a hallucination,but still scared the crap out of me!), Freddy Kreuger (but pretty sure you've seen him already) and any movie that has to do with mirrors(weird phobia I have) Haven't watched much scary movies,but those have to be some of the scariest I've watched
I might have said that Boogie Woogie 고래 Sing-Along was scary and bad but I was exaggerating. The scariest movie I've ever seen was probably Cannibal Holocaust. I saw it when I was ten and I swear I had nightmares for months and could had to sleep with my lamp on for almost a year. It's the most f*cked up movie ever.
I have three, The Haunting in Connecticut, Insidious, and The Crazies. The Crazies didn't scare me as much as the other two, but yeah the other ones made me scared to sleep in the dark for a while. Then again, "Devil" kinda freaked me out so if they aren't scary don't blame me xD