This is just an idea that popped into my head when I should of been paying attention in class. I would of used Kratos as the American Protagonist, but Duke Nukem seemed to be more stereotypical.
I like both. Cloud is a good protagonist if you want a well-developed hero in a well-written story, while Duke Nukem is good if you want a hero who can amuse you with one-liners and excessive manliness. It doesn't hurt that both heroes fight with oversized weaponry.