Wiretapped you didnt mention whether you had read his Dark Tower stuff, 1st book is a little slow, it really starts to take off 2nd thru 4th book, I wasn't really impressed with books 5-7 but Wind Thru the Keyhole was pretty good the 8th book. Of his other classics, Christine is up there also as is Misery (not supernatural tho). Of his more recent books, 11/22/63 is pretty great as is Joyland and Mr Mercedes, but those are not supernatural horror.
I did read his Dark Tower stuff actually. I really liked books 1-3, 4 was a little bit of a drag, and then 5-7 were okay. The Wind through the Keyhole is still on my to-read list. I've looked at 11/22/63, doesn't that story involve some sort of time travel?