From Nintendo's side, easily Fire Emblem.
Fire Emblem was a dying franchise, mostly because of it's stuborness to evolve and adapt new mechanics to make it's games better than just good. It's thanks to the threat of death that the developers said "what the hell" and actually decided to take a chance and do something they wanted, instead of being held back by what the old fans expected out of the franchise.
Sorry for expecting good level design, strategy and interesting characters out of Awakening.
On topic, I think DMC3, after how bad 2 was, picking itself up so perfectly and elevating the entire genre with it is one of my favorite examples.