Tom Cruise has played iconic roles in both sci-f and action films, but has yet to make his MCU debut. We think any of these characters would be a perfect fit.
Reed Richards has debuted in the MCU, and even though many fans are happy with the casting, there are plenty of other interesting we would've liked to see.
Despite how WandaVision ends, Wanda Maximoff fully embraces her villainous Scarlet Witch persona in Sam Raimi's Doctor Strange in the Multiverse of Madness.