Smith's character in the film, Army virologist Dr. Robert Neville, is the lone survivor of a zombie-making virus that devastates Manhattan.
Nominated for his "value-based leadership," Neville received 27 percent of the cadets' 2,200 online votes.
Runners-up included King Leonidas of "300," portrayed by Gerard Butler, and John McClane of "Live Free or Die Hard," portrayed by Bruce Willis.