The Inquisitor makes the most sense Light-side. You are a former slave, and many dialogue choices make light of this, including that you have no love of the Empire due to being a slave.

Opposite of the Warrior, who is painted from the get go as a 'chosen one.' and all your other opponents fear and hate you for this reason. Vs say, the Inquisitor, where your first aquaintance is a meek fellow slave.