SHAPESHIFTERS! That seems like a great idea to me!
“Here NPC, I’m going to help you not die like a moron by giving you this large axe. AAAAGGH!” In the case of this type of situation, a Shifter will only activate when it considers itself to be ‘x’ amount more powerful than you and there are no non-shifter NPCs around. If you happen to have multiple Shifters as followers, they will turn on you at the same time.
We also need bush ninjas. Ninjas, that attack from bushes. The only thing worse than a bush ninja, is a space ninja, then a space bush ninja!
But in all seriousness, all those bushes you see around are perfect candidates for ambushes.
Illusioneers appear as regular objects/furniture, but when you get to close, its facade will fade and you’ll be faced toe to toe with a dangerous beast!
You cleared out all the zombies, but did you clear out all of THESE guys?