At this point, the Negan star is a nerd culture icon, but many still believe his greatest genre performance came in this 'unfilmable' sci-fi epic.

Jeffrey Dean Morgan is best known for his role as Negan in the long-running zombie apocalypse series "The Walking Dead".

Negan was a polarizing character who entered The Walking Dead like a wrecking ball. After five seasons playing him, it's safe to say it turned Jeffrey Dean Morgan's life upside down.