I don't mean like the voice actors of the playable crew members we all know, I mean like the voice actor of the zombie enemies themselves. (More specifically from WaW to BO3 Pre-Zombie Chronicles) This has been a mystery for me pretty much since I first played Zombies literally a decade ago and it doesn't help that the COD Wiki doesn't show a list of voice actors for each game in the Zombie's page. Apparently IMDB supposedly found who voiced the zombie enemies in WaW, but they also don't credit the same person under "archived audio" for the zombies in Black Ops 1, 2, and 3 (Pre-Zombie Chronicles) despite the zombies in those games sounding the same as they were in WaW so I'm taking that with a grain of salt.