Well, if we're going not by who our favourite or by opinion most cool character is, but who the most bro guy is, then I'd have to say Ling. He's by far the most bro. Much more than Mustang. Bradley is cool and strong, but he's anything but a bro, and Greed is only a bro when he feels like it/when it's in his best interest/serves him the most. Though to be fair he and Ling interchange, so, eh...