Oscars Quest in act 3, no questions. I just don't save him anymore, he doesn't deserve it. He nearly kills his new wife and torments another one even after death, because he makes everything about himself. The little piece of crap can stay a Zhentarim slave for all I care. I deal with the Mystic Carrion to help the polite zombies.
Oscar himself does not torment anyone - the ghost of his ex-girlfriend does. If you talk to her, it becomes known that she is the “main evil” in this situation. She committed suicide not because of Oscar, but because of her own mental problems. Oscar's mistake was to “take it personally” and that because of him the ghost was unable to get peace and now she is taking revenge on him and his wife. If this situation is resolved by sending the ghost to rest, Oscar comes to his senses (and he did not wish to harm his beloved wife, he was possessed by the ghost and was under her control) and the couple goes on to live a happy normal married life. The player, of course, authorizes the quest solely at their discretion, but I just don't think that Oscar's mistake with the ghost of his ex deserves such a serious punishment of two people at once (Oscar's wife, who loves him, will also suffer in this case).