Zenescope has some of the best comic books around. Go to zenescope.com. they are having a dollar blowout thing. My favorite series is Final Destination. only three of 5 have been made thus far, four is due out any time. The graphic novel is slated to be released before june. Also, the Grimm Fairy tales seem to be really popular and have a really twisted story to them (Much worse than what the Grimm Brothers wrote). So check those out. I have been in touch with Mike Kalvoda (writer of the final destination comics) and he has given me some interesting "inside" information. Sadly, i can't indulge any further on that. But be assured, you won't be disappointed. Also, from another company there is the Walking Dead (good series), but you will have to get them in graphic novel soft cover. the first five in the set are hard to come by if you attempt to get the basic comics. You can also get ZOMBIES. There are two series in that. Zombies Eclipse of the undead and Zombies Feast. they are put out by IDW. You can go to the site and get those. They are sets of 5. Zombies Feast was the first series. Another interesting comic series is by avatar called Blackgas. take a look at those. And another good series is Zombie by Max Comcis. Max comics is a subsidary of Marvel.
Zenescope (Zenescope.com): Grimm Fairy Tales, Final Destination, Se7ven
Image (Imagecomics.com): The Walking Dead
IDW (IDWpublishing.com): Zombies Feast, Zombies Eclipse of the Undead
Avatar (Avatarpress.com): Blackgas
Max (http://www.marvel.com/catalog/?book_id=6165): ZoMbIe
Hope that helps