It doesn't show off the largest taste of power, but as far as how well the trope has been done, is probably Dunban in Xenoblade Chronicles. It's more story oriented than how most of the time it's more shoe-horned in just to entice players. Symphony of the Night could have easily started with Alucard unarmed, or with trash equipment and start grabbing better stuff at the entrance and the game wouldn't have changed at all. It was just a ploy for enticement. But I can't really fault it. It was barely even a trope back then