#6 Lee Everett
Mr. Everett wasn’t much else but a history teacher before the zombie apocalypse. Unfortunately he finds his wife sleeping with a state senator. In a fit of rage, he kills him, getting him convicted of murder. There’s the wife out of the window. In addition, he eventually gets to his family business and finds his (spoilers) family dead or reanimated into zombies. Many of his friends die. It’s all a tragic roller coaster for Lee.
At least he’s got Clementine to give him something to fight for.