Contemporary? As of now or future? Or do you mean being one as an individual?
To better others you must first better yourself. Leading by example. Being able to inspire. Show confidence bravery and strength and hope to others, you must be hard but forgiving, devoid of weakness and no erring of your resolve there will be an aura about you that really shows there will be no doubt. Maybe you can remember having met such people yourself, they may not have realized their potential.
For most people I think there is a limit, there is such a thing as natural born leaders as there are thinkers and creators, that's why the rarity of reaching such a state and the tremendous task it can be is why we do not see such people very often simply because they have not realized them, but they do exist, they do appear, and they can be made, by themselves. It is by no means impossible. The only thing that prevents most people from becoming this is mostly fear of failure that prevents realization and such pettiness must be thrown out the window in order to become great. As in the same way how to become successful you will have to take risks, follow right course off action and to fulfill your task without hesitation, you will have to be dedicated, never having stopped over a failure, keep pounding and and not stop until the desired goal is achieved.
In a real Nationalist society there is no such thing as individualism except what is found naturally and reasonably, such as within the natural family unit, which includes property, rights and such, the person himself is an individual and he chooses where to go in life and what do with it. However what ultimately should be done is for the people, and vice versa for the state; and no one will be allowed to disagree with that, only there is the true totalitarian aspect of National Socialism. Regardless our types of ideology shouldn't be conflated with the same individualist destruction that contaminated this entire modern world that has led us to the brink of destruction. Because of this we must have, and seek unity, because it is only as a highly motivated collective/group can we bring about the changes we want and truly get a great society. And as far as the other races are concerned they should seek out the same.
Fascism itself definitely works, but is simple and in some ways displays crude societal idealism to the state that is, not really powerful in the sense that it does not wholly unite people and state in a true sense but leads populace to the state alone, this is not enough to stand a test of time, it is not well thought out enough in my opinion. And as we know racial homogeneity ensures compatibility and is key to have a stable society, as in people tend to think alike. But to do things for state alone is erroneous thinking, It's an understatement to say that idealism an oversimplification of human life more prone to corruption. What is a leader if he loves the state but not the people? The only reason we have a society in the first place because we agree as a people to perpetuate it, the state does not exist on it's own head, ultimately it is the body(the people) who are more important and what holds the head and they work in unity to fulfill goals. That's why I'm a National Socialist.
Collectivism is strength, and meritocracy is the answer, systematic individualism eventually only beckons frailty, human error, greed and destruction as it does today, we cannot rely on the individual too much or the state too much, and there is definitely a balance but it will have to be ruled by the best and brightest which means Top-down, where naturally the greatest people will find themselves, and none who have agreed to the basic foundational law and duty of such a society will be prevented from aspiring. This is can also be found in nature, in one way or another. And it does work to form a cohesive, powerful group.
Yes naturally there will be disparity in humans but we should do what we can to nurture and lift the "lowest" of our people up, they should have as much merit and prospects as the head of state given that they are willing to work for it and agree to the foundational laws. In any system there will be classes, it is unavoidable, but it in a National Socialist state it does not matter whether a person works with their hands or head, they work for society in their own way and are truly equally useful in the machinery, in such a society where people are not overlooked most people would be perfectly fine in doing their jobs and would be content in doing so, everyone regardless of their stature, wealth, class will be tested and there will be civil service for youth to make sure of this unity without exemptions to do the same work for a period, and it will not matter if you were born rich or not. The same meritocratic standard will be expected of everyone regardless.
Socially in a way achieving perfection or high quality in humans or society are perpetual and cyclical. From the collective comes a Great individual, and nurtured enough from this great individual there comes a stronger collective, repeat enough times and there within lies the answer; unhindered in such a state naturally after a frame of time it is inevitable the real almost unbreakable human strength of the greatest people rise, call them Herrenvolk or Übermensch. Comparatively the reverse of this is unnatural creates decay, and finally given enough time the Subhuman. Which is what we see attempted today in the degradation efforts done by Jews and their collaborators of our great peoples under various unnatural anti-human doctrines like Communism, Marxism, Capitalism and Cultural Marxism.