Eberron might have some of the inspiration/information you were looking for.

Droaam is a monster nation led by the Daughters of Sora Kell, a legendary trio of hags. They're innovators: they feed their nation with troll meat, keep the peace with gnoll mercenaries, subvert other nations via criminal activities, and gain information via Daask, an organized crime syndicate using various monsters.

Another group of criminals is the doppelganger and Changeling (whose name escapes me but its one of Sharon's main gangs).

Either might consider a collaboration on a temporary project with the Lords of Dust.