Well, I don’t think they are necessarily scary either, but they obviously try to be “scary horror” as opposed to Rear Window or the X-Files, which while they can be scary to some, they have a pretty clear difference of tone to them.
I wasn’t sure how old of movies to pick, because while Nosferatu (1922) was certainly scary in its time, it is almost a laughably funny movie now, if one can sit through its rather slow presentation.