Clark Johnson (Augustus Haynes)
Most Recent Projects: Santorini Blue (2013), 666 Park Avenue (2012), Unforgettable (2012)
The Prognosis: In the '80s and '90s, Clark Johnson worked all the damn time, culminating in an impressive 122-episode run on Homicide. Since then, including his role on the final season of The Wire, he appears to be more selective, not that that necessarily means he's only worked on quality programming (666 Park Avenue). Santorini Blue, an indie comedy about rekindling love, doesn't sound like it'll appeal to viewers who loved Gus' gruff style and sense of ethics. For the gruffness, you'll have to look to his behind the camera work, directing episodes of The Walking Dead.