Who was the most foolish ruler of all?

This thread probably won't go too far, but just curious. What are your nominations for the most foolish rulers of all time in any of the books and how so?

There are several, but these are my top personal pics:

-Ar-Pharazon, last king of Numenor. For bringing the enemy home, and leading to the downfall of Numenor.

-Earnur, last king of Gondor (pre Aragorn) for riding foolishly into Minas Morgul for a duel with the lord of the Nazgul while accompanied only by a small group.