Oh, this makes me grin a big grin. This zombie is from Archie Comics artist Dan Parent. Dan has also done work with Felix the Cat Productions, Mattel (Barbie), Disney, the list goes on. It's not often that I get such an iconic artists' sketch, but now that I have this one, I have a dozen others I want. Zombie Betty, Zombie Veronica, Zombie Jughead... God, I need the whole gang!
Max Brooks is one of the most influential figures in modern zombie fiction. Max wrote the Zombie Survival Guide in 2003 and followed up with World War Z in 2006. WWZ is phenominal, and the dozens of other recent zombie novels over on Amazon all owe their success to WWZ for paving the way. WWZ is currently being made into a film, and part of me doesn't want it to happen. There is no way to top the novel, and I feel like I'm just going to be disappointed. Of course the other part of me, the larger part, can't wait.
Joe Dodd is a killer artist that has had his hands in various G.I. Joe and Marvel comics, and most recently he illustrated a fabulous book called Tales From Wonderland: The Mad Hatter, an origin story for the Tales From Wonderland version of the Mad Hatter. Theres some twisted stuff in this book, and you need to check it out, if for no other reason than.. zombie wall.
Jeremy Bastian is an incredible artist. He creates these monstrosities and these structures and these creatures that all inhabit this realm, and you know that if you were to crack open Jeremy's skull and peek inside, all of these creations would be in there waving back at you. 
The guys at Unshaven Comics are marketing savants. Their sales pitch for their latest book when I met them (probably expired by now) was "Buy our book and we'll draw you as a zombie in our next." Woah-- They could have sold me anything. 
Paul Allen Ballard is a freelance illustrator who does all sorts of awesome stuff including sketch cards, collectible card game art, Star Wars promotional stuff, and the thing that really grabbed my attention, the covers for the comic book Zombies of Mass Destruction. They could each be a movie poster. I would hang each of those covers on my wall, especially number 3. Zombies of Mass Destruction is written by the creator of the Underworld movie franchise, and has itself been acquired for movie rights. It's about zombies being used as WMDs, which I personally think is a fantastic idea.
Jason Yungbluth is a writer for Mad Magazine, and creator of the comics Deep Fried and Weapon Brown. Deep Fried is an ensemble of Sunday comics gone mad, both in web and paper comic formats. The craziest of these is Weapon Brown, a post-apocalyptic Charlie Brown that you really have to see firsthand.