It's not really practical to model your character after one - it's more like a 'which superhero are you' question, like if you had to be one of these guys, which one would be appropriate?
Given how preoccupied just about every medieval ruler was with inheritance, that right there is enough to make BM characters incomparable.
I don't know Edmund enough to peg him, but as a wild guess you could try Richard I (the Lionhearted). He wasn't as romantic a figure as he is portrayed (e.g. Sean Connery in Robin Hood). Pretty complex guy. He was generally considered an excellent general and a mediocre King (which may not translate well to Edmund) but he could be summarized by "grumpy guy who preferred French to English, the Aquitaine to London, and kicking ass to collecting taxes."
