Return of the Night of the Living Dead was basically a big shitpost about small business tyrants and the military industrial complex causing disaster through their own negligence and bloodlust. Its sequels weren't great but they also didn't really do the normal zombie thing: the second one has suburbanites turning on each other after the military botches the cleanup of the first movie and the third puts the zombies in the role of elite military bioweapons. The fourth and fifth are completely unrelated early 2000s b-movies about the military industrial complex trying to make elite shock troops out of zombies and something incoherent about drugs being made from the zombie serum for ??? reasons that were pretty much just a narrative excuse to have a horny rave sequence.

I got drunk and watched some movie on netflix a few years ago, I think it was called Rezort or something like that, that was about refugees being literally dehumanized and commodified for private profit. It wasn't a particularly good movie, but it was a pretty scathing critique of the zombie genre in that the zombies were explicitly victims being put into a situation where park engineering rendered them harmless so rich freaks could hunt them for sport.