I agree with milf before i started skipping posts because they were tl:dr. I wouldn't call the CoD's zombie games. They are games that also have a few maps with zombies in it. But yeah the zombie genre is about survival not so much zombies. Why do you think the show walking dead is doing so well?

I agree about the point that zombies are everywhere now but I wouldn't say all the games you listed are really "zombie" games.