OP here: More context: When I say league, I mean in terms of having a vision, articulating and executing it. All other things being equal, both BG and SJ played a major role in making computers ubiquitous through their companies. So financial success is not a huge parameter in here.

My 2$: I think next such impactful visionaries might be those who make AR and VR mainstream. Only my personal opinion, MZ and JB are not in the same league (with due respect to their hard work and intelligence) thus far.