Don't know. A name which comes to mind if you have to win complex fight with cruel angels using giants robots piloted by young teenagers then Gendo Ikari is your man. Yet I wouldn't want to be the one fighting, even worse if I am his son lol. But he gets the work done despite the odds.
Askellad is another good name. For sure a smart bastard more than capable of leading a group which feels real.
Then maybe some real smart guy from HxH, maybe Kurapika is the best here. Gon for sure would be a mess since he is too emotional but also selfish. But I guess them don't count since they are not real commanders/rulers or have position comparable to those. Perhaps Netero?