|Now that's an undead cowboy right there.|
The whole Weird Western thing really lends itself to zombies and other spookiness well and there is something somehow appropriate about gunslingers and death in the same image.
|It's really just a trench coat and a skull mask when you get right down to it.|
Now you might be able, without the benefit of CGI, to pull off a decent Death Marshal...
But you just ain't gonna pull off Ghost Rider. That's okay, you can still do some pretty nifty costumes if you have the time and the skill. Your choices are not limitless if you want this to work. A ghost cowboy is pretty high concept, but you could manage it. Your basic two are the skull and the zombie.
I may or may not have said this before, but you don't want to spend all night explaining your costume to people. A costume should be either an immediately recognizable archetype, the oft-mentioned visual shorthand I keep harping on, or it needs to immediately tell a story. When you look at the zombie guy, unless you are up close, he's just a fancy gunslinger. When you look at old Poncho over there you get a story. The skull, the cut noose, the poncho evoking images of Clint Eastwood in spaghetti westerns, it all combines to tell us a story. Somebody gave this cowpoke a hemp necktie and he liked it so much he kept it. And he's got a mad on.
Weird Westerns combine westerns with things like steampunk, science fiction, aliens, and of course, horror. You can definitely have some fun with the concept and with a little time and effort either of those could be the basis of a unique expression of your own, which I highly recommend.
Yeehaw, keep them pumpkins rolling.