Andy Hallett
Like Quinn, Andy Hallett garnered a large fanbase for his role as Lorne on Angel. But Hallett’s death in March 2009 was much more tragic. Following a dental infection that spread to his bloodstream in 2005, the actor developed cardiomyopathy. In the four years that followed, Hallett was hospitalized at least three times for heart-related issues before finally succumbing to the disease.