7) Sean Bean
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Sean Bean isn’t the pickiest of actors when it comes to the movies he stars in (see: Jupiter Ascending), but when he makes a good choice (see: The Martian), he’s always great to watch. However, he too has yet to delve into a superhero role of any sort, and while the time for him to play a Batman or Captain America type hero may have passed, Bean fully fits the bill when it comes to the older and rugged mutant Cable.
We’ve seen the actor play so many stoic characters that it’s pretty easy to picture what he could bring to this role, and the Merc with the Mouth breaking the fourth wall to address how many movies Bean has famously died in would be make for some great comedy.