Well, princess, I can see how politics can work into this but how would really help? You would have the same authority as you would've even if you didn't marry him, and what would the public's view be if they find out he was forced to marry you? And does he even have the skills to become king? last time I checked he was a commoner, you may put the country before everything else but what changes if you marry the hero? I don't see what kind of change it would have unless the people of your country force you to marry a random person just because he saved like the entire world, what about the others that helped, the mage, the knight, and the priestess, he didn't do it all by himself, and what about his feelings? he's a human being, he's not just a tool you can use. It's like pulling a kittens tail just because everyone wants you too, it doesn't benefit in any way, except empty entertainment.
*mic drop*
i suc