Michael Corleone, in the sense that he gets more and more spiritually isolated as he evolves.

It's such a great show. Did anyone else's opinion of Walter change after re-watching? I guess I was so accustomed to liking the protagonist as a hero, that it clouded my judgement on the first watch. I thought Walter was cool and Skyler was annoying. But after re-watching, I dislike walter a lot, especially for what he does to Jesse and his whole family lol.