28. Dr. Denise Cloyd
A major character in creator Robert Kirkman's original Walking Dead comics, Denise was completely transformed between the page to the screen. She was gay instead of straight; nervous and inexperienced as a physician instead of strong and skilled; and she took an unexpected arrow through the eye long before her tale had been fully told. Nevertheless, the quiet decency in actor Merritt Wever’s performance and the tenderness of the doc's romance with Tara was enough to make her untimely demise genuinely heartbreaking.