I agree with Mr. Spooner's comment - Bernie Wrightson kicks major ass. I've an original signed print of his up on my living room wall along side some of his prints from SK's The Stand. From Swamp thing to The Punisher to Heavy Metal's Stern to several SK novel illustrations, Bernie Wrightson deserves more credit than just "the artist".
I've got to agree with Spooner and Ferrit, Wrightson is a seminal horror artist. I have a poster of Mementos that will be adorning my wall as soon as I can find a frame for it. Hell, the best part about Kings Cycle of the Werewolf is Wrightsons art.