Nice list and hat! I should get The Long Halloween or some BPRD sometime. I'm going all-in this year too. Been saving up the second Revival trade, Vertigo's new one-shot The Witching Hour and the Dark Horse mini-series Colder (the first cover is so disturbing) all for this Halloween. And then the Adventure Time Spoooktacular in case I get too scared haha. :)
If you're going to include Kirkman's TWD, then you at least need an honorable Halloween mention for his Marvel Zombies books...pure "off the tracks" lunacy featuring the entire Marvel Universe getting...well...zombified.
Neil Gaiman is a god uAu. I think the manga I Luv Halloween should definitely be mentioned. The art was great, story held up fairly well to the end..during the time it came out, I couldn't make it through it. Then again I was pretty young...hm, still, it's a pretty good read if you're interested in dark comedy and children being assholes.