I think Ed's definitely earned this happy ending. Equivalent Exchange, right? (That is, until Winry overturned the law, lol...gah, what an awesomely geeky proposal they had...)
Another tribute by yours truly! This is essentially FMA in a nutshell. "When Ты overcome that pain, and make the lesson your own...you will gain an infallible, irreplaceable, fullmetal heart." <3