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.
Cazador: the fight is entirely unfun and part of why I don't like that quest at all. It's just a slog going through the masses of undead.