They can be forceful, but not normally...i still dont believe they would be good kings. I dont think a head type can have enough knowledge to be a king. It would overwhelm, and i dont think a decisive type would be as good either. If an ENxJ would focus on the people that surround them and those peoples ability at what they do and manage that, he would make a very good king...and the country would be managed by many, but controlled by one...indirectly. There is a difference between a leader and a manager. Leaders lead the country in a direction, managers are more of an over seer of everything.