Psylocke, Storm, Rogue and Jean Grey are superstars indeed in the comics. Dazzler is the Queen of Pop in Marvel Charts. Polaris is magnetic. There's also Jubilee, Kitty, Husk, M and Armor.
While other X-Women (though underused) could be utilized in the movies for Xpecific reasons. Dr. Cecilia Reyes M.D. of Grey Sloan Hospital is The Good Doctor. Sage is the X-Men's resident tech giant herself, that could rival Stark Industries and Pym Technologies. Marrow is the underground tunnel princess of the Morlocks.
Then don't get me started with the Femme Fatales who are up to no good. Emma Grace Frost. Lady Deathstrike. Callisto. Lady Mastermind. Zaladane. Selene. Spiral. Cassandra Nova. There are no limits to these baddies.