The Returned.
World War Z
Warm Bodies
Cockney's Vs Zombies
Shaun of the Dead
Resident Evil series
Land of the dead
Diary of the dead
Survival of the dead (only if you want to see the sequel to diary, though only a select group of characters are present, this one bombed, like badly)
Last days on mars )essentially alien zombies on mars(
The Crazies (not quite zombies, but close enough)
Zombieland
Planet Terror
I am Legend (not quite zombies, not quite vampires)
Splinter (not quite zombies, but the dead do reanimate into new creatures)
House of the dead 1 and 2 (hey, it's zombies and there's tits at least in the first one)
Braindead (dead alive)
In the flesh (series)
Bite me (webseries on machinima)
https://www.youtube.com/show/biteme (both seasons on here) they're webisodes, but it was actually well done.
Pretty much exhausts the list before you start moving into the really B movies.