Two of the three Oscar-nominated roles Martin played have been based on real-life people, Abe Karatz in Tucker: The Man And His Dream (1988) and Bela Lugosi in Ed Wood (1994).
(about his role in Ed Wood (1994) as Bela Lugosi in Plan 9 From Outer Space (1959))
Martin Landau: It was just terrible. But here was Lugosi: old, addicted, sick. Couldn't take your eyes off him here in this terrible movie. He was fascinating and I became an enormous fan, and I said I want to do this guy justice.