You forgot to add Shillinger to your list of dead people, Mohrg.
Beecher shanks him accidentally because Keller replaces a prop knife with a real one and they were acting in a play.
Then Beecher gets charged with it and has to stay in Oz for a long ass time (life maybe, can't remember), then Keller is like "Now we can be together forever with nobody to bother us!"
Then Beecher gets pissed and pushes Keller off the second story of Em City and Keller DIES.
Oz fucking ruled, I've got season 1 and 2 on DVD, they need to fucking hurry up and come out with seasons 3 and 4.