Fan Casting Immortal MCU

Imagine a world where actors and actresses never died and could reset or jump forward to whatever age they wanted, whenever they wanted. In this hypothetical world, who should be the cast of the Marvel Cinematic Universe? Any actors, dead or living, old or young, are allowed as long as you believe that at some point in their lifetime, they could have been, or will be, a good choice for a particular role in the MCU. Actors who were in an MCU movie are not allowed for the roles they already play, but they can be nominated for other roles they could have played at a different age.