What type of leadership is most effective (according to research) for building teams? What antecedents may be present in leaders that can enhance their ability to set team goals and facilitate team effectiveness?

What type of leadership is most effective (according to research) for building teams?
What antecedents may be present in leaders that can enhance their ability to set team goals and facilitate team effectiveness?
What are some characteristics of leadership-type that you identified for this paper?
Use a sports leader active between 1960 and present day to use as an example in this paper. How did they capitalize on these characteristics (whethchoer they understood them or not)?