Why is it every apocalyptic story nowadays must have a sadistic psychopath who uses the opportunity to take over the town or the world? This idea is not only no longer original, it's sickening. That type of character was the main reason I stopped watching Revolution.
The only storyline I liked where this type of person was a main character was Stephen King'sThe Stand, both the book and the miniseries. Since Under the Dome is also a Stephen King story, you'd have thought he would have come up with something more original.
The end-of-the-world stories that don't have a psycho in them, all of which I still love, are the original Battlestar Galactica (Baltar doesn't count, as he was working for the enemy and he was eventually dispatched with), Jericho, Deep Impact,The Day After Tomorrow, the 1632 novels and Alas, Babylon. Lost didn't have one in its first season, but from the second season on all of the new characters the writers kept adding fit this description, and again, I stopped watching.