Hughes is a man who would close off his conscience when killing people in the Ishvalan War in order to keep his sanity intact for the sake of his beloved wife and daughter. He is also someone who could not even shoot the "presence" of his wife when Envy turned into her. Even though he knew well that thing was not his wife, he refused to shoot the image of her out of shock, surprise, but most of all, love. Sure, it led to his death, but the fact that he would choose death over tainting the very image of his wife with his own bare hands says it all.
Although it's possible Minato would have done the same thing given the chance, I'm still giving my vote to Maes Hughes. Don't get me wrong, Minato is a fantastic character and he's also a great father like Hughes! However, I still choose Maes Hughes.