The Qur'an describes two main qualities for leadership.
IMRAN KHAN IS SINCERE AND COMPETENT. Trustworthiness goes along with it.
4:58 God commands you to entrust (your offices) to those who are competent and sincere. And when you judge between people, judge equitably. Excellent is the Enlightenment which God blesses you with. God is Hearer, Seer (of all that transpires in your society).
12:55 Joseph replied,"Place in my charge the land resources (the treasury) of the State. I will prove to be a knowledgeable guardian." [Now that he could personally handle the coming drought. 28:26]
27:39 One of the strong commanders of the mountain division said, "My troops can accomplish this mission with lightning speed, before you rise up to think of and assign anyone else. I am competent and trustworthy for this job."
28:26 One of the two maidens said, "O My father! Hire him (Moses)! For, the best one you can hire is the competent, the trustworthy." [Competence and trustworthiness are the essential prerequisites for a responsible job. 12:55]