Originally Sergio Leone wanted Eli Wallach to play the part of Juan Miranda,Also George Lazenby was offered the part of John H Mallory but he declined.
Would this movie had been as good if Eli Wallach and George Lazenby had been in it
It's hard to know if it would have been better or not, but I do think I would have preferred Eli Wallach, but I wouldn't want to replace Coburn with Lazenby. The movie is good, but part of me wishes that Wallach could have done the movie.
Well the only reason he only did it once was because Broccoli (the producer of the bond films) wanted a long (multi-year) personal service contract with George, that restricted all of Georges ----everything---personal and professional.
George wanted to do Bond a couple more times but also have freedom to do other films in between
Broccoli wouldn't have it, so we got stuck with all the slugs after
You don't have to stand tall, but you do have to stand up!