I have to agree to Steve (as much as this breaks my heart ). Maybe take a look on the official “Zombies” and Skeletons. They are quite nice already and might be a good starting point, no? You could go from there and apply the same look to the “dog” and potentially all other assets.
@rayman30011 they where just shown in some “older” live streams and this wallpapers… so I guess it is easy to miss them. The good news is that you can get the unofficial “copy” of those Zombies from the following thread as @Pandemic reproduced and shared them :