According to IGN at least. It may seem pedestrian compared the lists around here but for a mainstream web site a couple of the picks were at least mildly surprising.
http://movies.ign.com/articles/851/851230p1.html
Or for those who don't want to follow the link...
10. Braindead (Dead Alive)
9. Land of the Dead
8. The Return of the Living Dead
7. Plan 9 from Outer Space
6. Dawn of the Dead (2004)
5. Dellamorte Dellamore (Cemetery Man)
4. Zombi 2 (Zombie)
3. Shaun of the Dead
2. Dawn of the Dead (1978)
1. Night of the Living Dead
Like I said, for us it's a predictable list but for a major site like IGN who seems to cater to the young and the feckless (don't get me wrong I like their site but you know I'm right) it at least gets some of them right.