I think the format of the story is solidly going Sci-Fi, so use Spock--and if they've got some sort of Holo-deck maybe we can see some cameos from the other three (since the aliens seem acquainted with them already...and hopefully their version of Conan doesn't take it personally that he's not in the lead on the vote!)
I really think Spock could take anybody on the list. I mean, he's super-strong and knows a plethora of combat techniques. He's not huge like Conan, but he's definitely not a wimp.
That said, I had to vote for Conan. Anytime I see that name in a poll, I vote for it no matter what. Unless He-man is also in the poll, in which case Conan loses out.
Beatrix Kiddo. You don't want a guy as a sidekick. And I don't know who that other chick is, as I've never watched that show. Spock would probably be fun... for about 5 seconds. Conan... Somehow I picture Schwarzenegger's Conan, and imagine getting all my advice from him for a lengthy adventure. Not a fun thought. So Kiddo it is. Sexy, smart, deadly as hell... Nuff said.
Devious Comments
That said, I had to vote for Conan. Anytime I see that name in a poll, I vote for it no matter what. Unless He-man is also in the poll, in which case Conan loses out.
Olivia comes with too much emotional baggage, as does Beatrix.. ay, ay, ay.
Conan would be great muscle, but we need brains too. X3