You pretty much = me. Serenity? Batman Begins? Jensen Ackles?! YES. Yes to all of the above.
That being said, I'm having a tough time picking between a couple of the troopers for you. Lipton seems like a good choice because he's a quiet guy who can give you what you need in terms of leadership and seriousness (plus, his smile is adorable.) And there's Roe, of course, because of all the reasons you stated above.
But! I think Grant is your guy. He's a bit quiet, but he's calm, strong, well respected, and smart. A great leader, too. Also, he pronounces "Bastogne" really prettily.