Nomine is having a 100L on everything on marketplace right now, including robot&zombie skins

Dernier Cri had an awesome Zombie skin once, not overly done

Allegory: ooo thank you

Sasypants: I think I might have that one somewhere thank you

(and there are stitched together frankenstein skins and possibly others that also fit what you're looking for)

Allegory: awesome

Nomine's zombies are remarkable

I was gonna suggest Nominee as well.