I agreed on Musashi as a successful person because he didn't kill for the sake of killing or power: he was striving for perfection, which he achieved, which is good enough in my book. Needless to say, he didn't follow the Humans Rights Chart... But they would have sounded alien to him.
However... Just curiosity, Kingston. You've given a few examples of darkworkers, and a few of them crashed because their "power influx" was more powerful than them at a certain point. I am sure that you don't fear losing control (nor do I, since fear is useless ;-) . But I suppose you take that possibility into account. Do you have something planned in that case? I'll take for granted you don't worry for that, but, have you planned some self-control stuff in case your own impulse got out of direction and sent you where you didn't want to go? I am really curious about this one.