Girl Next Door is great, though it's pretty disturbing, and sticks to ya for a few days, mainly because the events in it are more realistic. The thing that I love about most of Ketchums stuff, is that it mostly deals with human horrors, and the evil man can commit. That scares me more then ghost stories.
Of course, Lovecraft is my favorite, but that's a given.
By the way, what Edward Lee books did you read? If it's his more recent stuff, I still like that, but it lacks the excess of books like "The Bighead","Mother Bitchfight", and "Goon", which he co-wrote with John Pelan, another great author. If memory serves me right, "Goon" is set in the world of Indy Wrestling.