Yeah, I don't think there is a possibility to boil things down so neatly. While success does indeed require overcoming many personal challenges (e.g. success means looking at the things most people don't want to do and doing them anyway), there are a number of external factors too.
Steven Covey broke it down nicely in his book
The 7 Habits of Highly Effective People.
The first "victory" according to him is a "private victory," where you move from dependence on others to independence. This is achieved by being proactive/taking initiative, establishing and concentrating on your end goals, and doing the important things first and foremost, while eliminating time wasters.
Next is the "public victory" of achieving interdependence amongst those you work with, whether they be coworkers, managers, or clients. This is achieved by thinking of win/win situations, achieving mutual understanding, and figuring out how to work together for the best outcome.
The final step is knowing how to maintain that level of interdependence and keep it going.
So, your idea that overcoming your own challenges will bring you success, I think is important, but it's not even half the battle. No man is an island. You can only do so much on your own, and in most cases it won't be very much at all, and so you must look to others and know how to influence them and work with them in ways where everyone benefits.