/co/ related, or in general?
Halloween Tree is a must. I'd start with it every year.
Its The Great Pumpkin Charlie Brown and Coraline of course, and as much Simpsons Treehouse Of Horror as you can take. Book Of Life, some Beetlejuice and Ghostbusters cartoons.
Halloween Is Grinch Night.
Disney's Legend Of Sleepy Hollow.
The Halloween-like Disney, Tom & Jerry, and Warner Brothers shorts.
The Disney live action specials from the 50's-70's.