What qualities should and must a good ruler have when ruling over people?

A partial explanation can be found in the words of John F. Kennedy, 35th president of the United States. “No government is better than the men who compose it,” he said. Since even the most gifted politician is imperfect, every government that humans set up is doomed to failure.
Simply stated, having ‘no government’ invites chaos. The question is therefore not ‘government or no government?’ but, rather, ‘what kind of government for the best results?’
For a ‘government by the best’ to be really the best, the elite would have to be chosen by someone with superhuman knowledge and infallibility in judging. The chosen would have to be individuals of unbreakable moral integrity, completely devoted to the immutable goals of their government. Their willingness to put the welfare of others before their own would have to be beyond doubt
Actually, God never intended for humans to rule themselves. In order to enjoy perfect government, humans need more than just government by supermen. They need theocracy, government by God.
The bible confirms that very soon all human governments will be destroyed and a righteous government will rule Daniel 2:44.