Two that come to mind are Luca Blight from Genso Suikoden II, who after getting a metric ton of arrows flung at him, a merciless beating from eighteen soldiers, and a final blow from the hero, met his end, and Zophar from Lunar 2: Eternal Blue, who's an extremely overpowered boss with the ability to deal extreme amounts of damage in short amounts of time without making any effort to stop an onslaught.