Horror Writer Needed

I just finished H.P. Lovecraft's Mountains of Madness, and I really don't think I fully understand the horror. It was interesting enough, but the suspense and actual scare factor never materialized. All I'm really left with is a desire to read more of his work to learn more about the imaginary world he created, which was pretty interesting. But I'm a long way from scared of it.

Maybe it's a matter of timing, but then again Bram Stoker still scares people and so does Edgar Allan Poe, so I don't think the antique factor is enough to exonerate Lovecraft.

So the question is, who are the classic horror writers who are still scary, and not just listed on the Required Reading lists at high schools?