I like the part where you come in and force everyone to bend to your will
What's funny about this is you get a Bend Will shout in Dragonborn and that makes this funny because wait it's not very funny but it's suiting I think what am I talking about?
Anyway, yeah, I already thought about this, as I'm guessing many others have. All things considered, it would be kind've neat to do something like this. Maybe for the irony, join the Stormcloaks, win the war for them, then challenge Ulfric to a duel. And shout him to death.