If you've ever seen Jerry Springer, the Duke would definitely be the guy who comes out last that all the girls or guys try to beat up right when they get on stage.
Why not Angelo?
I'm sure he would have gotten his fair share before the Duke shows up, but I see that the Duke should get most of the blame.
This entire play, the whole thing, the madness is caused by this single man. He doesn't want to be the "bad" guy and punish his people, so he hands all of his authority to Angelo with hopes he will take care of things. Then the Duke takes a "vacation, when he really just dresses up like a friar ready to start some shit.
We all know that Angelo takes his power to extremes and can be seen as a slimy hypocrite throughout the entire play. However, the duke the whole time was causing drama on his own. He made this entire plan to get Angelo for the same crime, he "saved" Claudio, and doesn't harshly punish any of his people for breaking the law (except Lucio). He was the hero! Yipee.
Not impressed.
This guy had this plan the entire time. He wanted to look good in his people's eyes and try to get the girl at the end. Poor Isabella. If I was her, I would have stayed just as silent. With my luck I would have said something that got my head and Claudio's head cut off real quick.
It's kind of disgusting how the Duke got his attention and "glory". He caused all of that drama for people just to come out looking better than he did before.
If I had a say, I would say off with his head.