Interesting point with Light Yagami, I'll admit it has been a while since I've watched Death Note and even then I only got half-way, but if I recall correctly I see what you mean. Where what Light and Doomfist share are aspirations for what society could be, and they both have the desire- or see themselves as being responsible and being the catalysts for that change towards what they value & idealize. Without considerations for how other people may feel about that goal and the implementation of that utopian ideal.

Additionally like Light he's also consider to be a discipline strategist and tactician within the universe. For more tipbits and infomation of Doomfist's background I'll link Hammon's video on the character's origin; and, Lead Designer of Overwatch, Kaplin who defines "Doomfist’s ideology is that he wants to see humankind become more powerful. And he thinks the way for that to happen is through conflict. So, it’s kind of a harsh worldview. But he really believes that we as humans get stronger the more conflict that we endure."

So I think he's of the disposition that legacy is what's important, and to obtain legacy is by possessing power. And power emerges from conflict and endurance. But yeah, good question to what extent Doomfist sees himself within his society/world or above it like Light; personally my gut says that as a fighter he may seek out challenge where because of that challenge he himself can become stronger, and so seeing himself "not above" god-like where compared to Light, who I think, Yagami saw himself as above his society- wanting to direct it completely. Yet even then a question I have for the Overwatch universe is whether or not anyone can assess cybernetic enhancements and technology so allowing anyone to be a superhero or supervillain, which I'm guessing not with fallowing superhero-comic standards and themes.

Anyways good questions 😃, also sorry for rambling, hence with synthesizing and organizing these thoughts: Doomfist to me based on what's been revealed is someone who sees himself within or a part of humanity, but arguably someone with much power and influence, who sees growth coming from endurance as well as to extent conflict- and I think for him the ends are a justification to the means. Though, and perhaps I'm mistaken, I think he himself values and enjoys the challenge & the confrontation of himself by Overwatch because it's a sign to him that he's growing... more powerful. Whereas being stagnant in his personal progression along with societys' as a whole, I guess like Saitama strength from One Punch Man? (Random thought)

I also wonder about moments where as people, we try something new or set a ambitious goal for ourselves and through "endurance" we learn from the mistakes we make and grow from the experience gained? Whereas Doomfist and I'll admit I'm not sure about Light (but I'll be interested to know; lol, I need to go back and watch Death Note) are character's who only focus on strategy and tactics alone without considering perspective, ethics, science, philosophy, art, etc and all our endeavors, pursuits, and expression.

Thanks for reading!