While Jeffrey Dean Morgan has starred in several horror movies, he appeared in his first scary film in 2012. This was a few years before he began portraying Negan Smith on The Walking Dead, a role he held from 2016 to 2022. Negan is one of the most complicated TV villains because while he presents himself as purely evil, he has many layers, and viewers see glimpses of his vulnerable side as the show moves toward its conclusion.