1. - Jean-Louis Trintignant, Il Grande Silenzio (US: The Great Silence), Italy-France, 1968. Until they quarrelled, director Sergio Corbucci wanted Nero for the spaghetti lead. Trintignant claimed it was his idea for the hero to be silent - “too much talking in Italian Westerns.” 

2.- Tony Musante, A Professional Gun, Italy-Spain, 1968.    When Sergio Corbucci (the other great spaghetti Western Sergio) took over Gillo Pontecorvo’s tortilla Western, he first wanted grey-eyed Nero as Paco, the Mexican... before seeing sense and making him The Polak. Corbucci was less delighted with Musante, a Method disciple and very much an American Gian Maria Volonte... as in over the top!! Corbucci kept Nero and Jack Palance but replaced Musante with Tomas Milian in his 1970 re-make, Compañeros.

3. - Al Liettieri,  The Godfather, 1971.