I feel like his struggle to be the light in the dark will help to further enforce just how bleak the setting is. I also don't think there will be too much conflict, at least among the PCs. At least with Grosvenor, I've tried to specifically tailor his Code of Conduct (I'm playing him Lawful as in he follows his own Code), so that he will respect his fellow companions, even if he doesn't necessarily agree with them, and won't outright come to blows with them over matters.