There's something that strikes me as sad that you all seem to be so quick to engage in this sort of conversation. When considering the characters of LotR, I find I cannot be so quick to answer this question, and am even at a loss for an answer. I find that you cannot really relate to the heroes any more than you can relate to Christ during his temptation in the desert. This sort of question ignores the nobility of the heroes at best, and denies or insults it at worst. We are not meant to relate to Aragorn or Arwen. I couldn't imagine marrying either one of them, although I suppose I would consider my bride to be my very own Luthien, in an archetypical sense. We aren't meant to relate to Frodo, Gandalf, Elrond, or even Faramir and Boromir, although they come closer to our world than the more noble characters. If we can relate to anyone, it would be Sam and similar servants. But even Sam is greater than any of us could hope to be. If I had to choose a character to marry, I would choose someone more like Rose Cotton. She and Sam are probably the best heroes for us to relate to, although as I said, they are still a level above us. I'll let Tolkien make my point for me:
"I think the simple 'rustic' love of Sam and his Rosie (nowhere elaborated) is absolutely essential to the study of his (the chief hero's) character, and to the theme of the relation of ordinary life (breathing, eating, working, begetting) and quests, sacrifice, causes, and the 'longing for Elves', and sheer beauty."
Considering the actors who play the characters is even worse. The films have successfully bled Tolkien's work of nobility, antiquity, and so many other things. Orlando Bloom is no more Legolas than a kid who dresses up like an elf for a costume party. And I could go on and on... you might as well ask which Christ-playing actor we would marry.
