Great leaders show the mixture of achievements and set backs by showing their strengths and weaknesses, kind of like kids in high school. Some are good at one subject, but not the another subject. Not all great leaders have all strength, they must have some weaknesses to balance them out.
I don't see less of a leader of either who show weakness or encounter failure. They both kind of mean the same thing anyway and that's what makes a leader. They do have weaknesses and/or encounter failure, but they can try to get better and become stronger from it. That's what makes leaders human.
There are a lot of leaders out in the world, but the leaders I think are great are the ones who fought for equal rights and their own right. They all may not had got through the end of the fights and get to feel the freedom, but they did have followers to help them achieve their goals. The leaders made great plans and speeches to encourage people to get what they want should have gotten in the beginning. Some of the leaders were kind of headstrong or too determined on what they wanted and gotten them killed from it and others.