Remember that the more skins we add to the server, the longer download loading times will be for a new players.
I think that the "Map Maker" skin is unnecessary, we have only 2-3 people who make maps, unless you really want to stand out.
There should only be 1 zombie skin because all other servers look like a mess with dozens of zombie skins, and it gives EH a unique identity being so clean. So in my opinion the fat zombie skin should remain by itself as is, unless you want to replace it with something new. Personally my favorite zombie skin was always the default bloody model from Half-Life2, simple and classic.