When it comes to pumpkin carving, Pumpkin Masters Pattern Books are the black cat's meow. My favorite one, hands down, is the Universal Studios Monsters Carving Pattern Book put out in 2003.
Patterns for Dracula, Frankenstein Monster, Bride of Frankenstein, Wolf Man, Mummy, and Creature From the Black Lagoon, make for quite the monstrous jack o' monsters patch indeed. Sadly, the book is long out of print and nearly impossible to scare up a copy.
So here are three patterns from the book to wet your pumpkin king carving soul.
Just Download Pumpkin_Masters_Monsters (Frankie, Gill Man, and Wolfie) and print out the patterns. This is a PDF document around 7MB.