Oh well, back to the drawing board.
But yeah, might work with Were-Flock of Doves Ghostwise Halfling Apostle of Peace, along with using Otherworldly somehow to become an outsider, turn evil, Savage Species myself an [Evil] subtype, Helm of Alignment Change back to good, take levels in Fiend of Possession.
Possess a sword.
Watch as everyone who picks you up suddenly decides that they have something better to do than kill people. In fact...
Make the weapon merciful and use Pacifying touch on whoever you hit. Profit.