I will certainly agree with you that King has a knack of, well, not scaring me, but making me feel uncomfortable in a way that not too many authors do. My soul feels "fouled" after reading one of his books.

But feelings aside, he skimps on substance. Take "Mr Mercedes" for an example. Are we really supposed to accept a near-unified public blame and hatred placed on a car owner because she left keys in the ignition? It's a big part of the plot, and it's just plain silly.

As to the "Pulp" label, it is not denigrating in my mind at all, but just speaks to the common audience and lurid or sensational subject matter. I think Stephen King fits the bill. Along with Dashell Hammett, Sir Arthur Conan Doyle, H.P. Lovecraft, H.G. Wells, and many more notable authors.