1) The ability to clearly articulate the vision and goals for the company then inspire the team to reach them.
2) Sets clear parameters for how to achieve the goals then empowers their team to attain them within those parameters.
3) Always demonstrates the ability to listen and to be empathic.
4) Leverages the ability to coach and counsel team members in order to attain top results.
5) Praises in public and counsels in private.

I could go on all day on this fascinating subject but I think the traits listed are certainly a good start for defining attributes typically found in top level leaders.