Ok then just a few companies to add:
Musketeer miniatures do three (including a Jean Kelly, screaming in the rain and a not blade for some vampiric action.
Crocodile games have two packs of modern zombies.
Golgo islands have a load of zombies, average casts, good for kitbashing
Westwind WWWII german zombies, separate heads make for good conversion.
FourA minitures (Manic Miners shop) nice little group of zeds
Foundry do some cowboy zombies to add some flavour...
That should do you for now