Doom zombies don't chase after you with low or high speeds and and try to gnaw on you brains. They prefer to blow you away at a distance or up close. These guys do a pretty good job at it, Shotgun blasts in doom can be devastating.

Partially sculpted on an old ml punisher, same exact thing for the former human. Sculpt the body armor and the head. The shotgun is from some resident evil Chris figure, just trimmed it down. The dead body is a quick sculpt over some foil.