Sarevok

Once the original Big Bad of Baldur's Gate who sought to bring the eponymous city to ruin in the name of Bhaal only to be defeated by Gorion's Ward, Sarevok Anchev continues to serve the god of murder as the custodian of Bhaal's court of murder while letting Orin, his granddaughter as well as Bhaal's Chosen, carry out his god's unholy will.

Example of:
Orcus on His Throne