Ye Olde Inn

Goblins: I'd pull from the smaller kobolds.(gougers, flingers etc)
Fimirs: Iron scales would work just fine
Chaos Warriors: Dread Knights for days
Gargoyle: Roxor is my first instinctive choice because of the rock form. Due to base size I'd prob defer to Von Drakk

As for mummy, I'd run the boneheads, whilst running rattle bones as skeletons.

Okay, I can see where you are going with this. It's probably as close as you can get with the current line.
But if you proxy the proxies you can make literally any game with these models