Orsino from Dragon Age 2
This character had interesting and tragic story. i liked how things turned up when it came to face wizards in the final battle. If you choose to help the order and murder all the magicians, Orsino in the act of desperation devoted himself using blood magic which was very dramatic in my opinion.
Unfortunately if you choose to help magicians instead of helping the order his actions are the same which make all of your efforts, well… just meaningless.