Our chief weapons are surprise. Surprise and fear are *two* weapons are surprise and fear and ruthless efficiency... oh you know the rest. The Imperial Inquisitors pop up now and then in EU material, outranking even the Emperor's Hands as force sensitive agents of Palpatine, under the direct control of Vader however. Palpatine's ultimate goal was to replace all heads of state, anyone in high command with them (Surely not Thrawn?? NO!). They're job is essentially hunting down Jedi and converting them into dark side adepts.
Some of my own inquisitors... a few altered from before, and this lovely statue of Palpatine.