That someone better.
It's about the Moral Philosophies of characters that players create to be heroes.
No need to create Moral philosophies for characters in D&D realms/settings with core book D&D cosmology.
With the in game cosmology/religions taking the stance of the gods being "Scientific Fact", expected and preferred behavior from any given deity is clear-cut: "My god says x."
Objectively speaking the PC's need only conform their actions so that they meet the minimum requirements that their god requires to enter the promised afterlife. No sophisticated "Moral philosophy" need apply.
The closest thing any PC might need to have to a moral philosophy would be the pragmatic need to weigh their actions against the mores and values of others in relation to their potential to enforce threats of corporal punishment.
So any Moral philosophies are either just projection of the players own mores and values on their characters. Or created whole cloth by the player for their PC above and beyond the requirements of their characters deity.
Circling back around to player disruption: No one cares what you PC's 'moral philosophy' is if your jerky behavior is disrupting the group.