The X-Men should be portrayed as they were in the 90's comics run for example of roster:
LEADER/TEACHER:
Charles Xavier / Professor X
BLUE TEAM:
Cyclops
Beast
Rogue
Gambit
Psylocke
Wolverine
GOLD TEAM:
Jean Grey
Storm
Iceman
Colossus
Nightcrawler
Archangel
NEW MUTANTS:
As a whole, the New Mutants should have the same roles as they did in the X-Men evolution series. They are added to make the Xavier Institute seem more populated by having several students in the background, and primarily have supporting roles.
MEMBERS:
Doug Aaron Ramsey / Cypher
Warlock: he is also Best Friends with Cypher, Network, Forge, Beast
Hisako Ichiki / Armor
Ellie Phimister / Negasonic Teenage Warhead
Laura Kinney / X-23:
Tildie Saomes: Has the Same Role seen in 2008’s Wolverine and the X-Men