Pff, i know I'm not courage. So, it's a toss up between Power and Wisdom.
I lack physical strength for the most part, but I'm very tenacious. Almost to the point of being unhealthy sometimes. I don't like the idea of giving up or giving in, and sometimes it seems that simply having reasons to stop doing something instead makes me do more of that thing. Like getting home after working 14 hours on my feet, and thinking "i can either rest or do the dishes", and then deciding on dishes because hey, momentum. But on the flip side of that, I can be home all day and not get a single chore done. And like OP, I enjoy leadership positions, and frequently come in conflict when I'm not in charge of stuff. If i'm capable of doing a job, I tend to think i'm more capable than whomever is the one doing it (whether I actually am better than them or not). I also tend to become the center of attention, whether it be by course or by force. So that says Power.
On the other hand, when afforded the opportunity, I spend inordinate amounts of time simply considering plans and courses of action. I observe people, and tend to look at how they behaved in a situation, and work backwards from there to figure out what motivated them, and what frame of mind they may have made that decision from (even if it takes some time to emotionally divorce myself from the event if it involved me). I tend to be slow to anger, and slower to react to goading attempts. When it comes to others, i nearly always favor diplomacy over edict. I like working closely with people, and strive to explain my rationale, that everyone working with me can see where I'm coming from when it comes to solving a problem. When dealing with real people, I have been told by others that I possess a deep well of patience, exercising restraint long past the point where others would have done. I attempt to remain eloquent and composed in speech and writing, maintaining a more academic heir.
But honestly, I don't think I am either, at least not wholly. But I feel that equal parts power and wisdom can be expressed in one word: Loyalty. Because it is my true friends who shelter in the strength of my friendship and personality, and who reap the benefits of my wisdom. And in turn they grant me courage. It is only through the best people in my life that I can view myself as the Triforce, whole and complete.
So there's your answer.