Quote Originally Posted by SodaDarwin View Post
As title.
To clarify, a person who is so obsessed with Good that they are willing to force anyone and everything to be Good. By any means necessary. Whether their acts are selfless or selfish, nice or horrifying. What would their actual alignment be? On the one hand, 'Good'... yet, on the other hand, atrocities are just evil...
...so basically an insane Celestial, I guess?
As has already been demonstrated in the thread and throughout history, "good" is a nuanced, contentious issue and open to myriad interpretations.

Personally, the person would be classified as Evil working for Good. That person is not moral if they commit Evil, especially at the cost of others, even for the sake of Good. How Evil would depend on the extremes of the atrocities that person is willing to commit. Being "Good" isn't simply about who you align to, but the conduct and adherence to the morals of the society the person aligns with. Bringing in societies with conflicting morals vastly complicates the matter. Most RPGs assume one predominant society's morals as the baseline to which all other societies in that game are compared to.

Therefore, instead of opening the question to modern world morals and what would invariably end up being unresolved, I would have to ask: Does your game's predominant society view that person's actions as morally acceptable or deviant?
Bringing in the moral compass of anyone else, including your own, complicates the decision. Heck, even if you take your own real life society's moral compass and compare it to your society's moral compass from one or two hundred years ago you'll find discrepancies. Perhaps they won't be extreme discrepancies but they will be there.