IMO: It would be boring to have it start in hell with a vanilla bad dude. I would use a place that isn't native for good; like, sheep in the jungle. No sappyness. Our protagonist does something good a little tactically and a little accidentally, and it starts getting muscular behind his back. He finds himself doing, well, good, and it goes from there. The protagonist has a very cynically opportunistic take on being the good guy. When in doubt, don't treat it as a morality lesson and instead treat good as a philosophical exercise. Thoughts?