Inspired by an explosive nerd rage argument I observed over Sisko Vs. Janeway, I want inspire that ire in our tribe as well.
Simple rule: there can be only one. Pick the best and defend them. Anything from J.J. Adams of Forbidden Planet to Dallas of Alien to Shepard of Mass effect is fair game, but you only get one.
Who is the best space captain ever? Pick the best and defend.