When I say X-Men members, these are the ones who worked as a X-Man or lived in the X-Mansion like the students and teachers.
-New X-Men 2.0 (Surge, Hellion, Dust, Rockslide, Anole and the other X-Students) I enjoyed their run in the comics and I wish they didn't end it with a freaking cross-over
but I don't see these mutants appearing in the movies.
-Changeling - Mystique 2.0
-Joseph - Magneto 2.0
-X23- Wolverine clone
-Sage/Lifeguard/Slipstream - I would love to see these three because they're a bit undershown in the comics but they are hardly familiar
-Lady Mastermind - Jason 143 2.0
-Omega Sentinel/Danger - I don't see a robot or a Sentinel working with the X-Men in the movies.
-Hope Summers - Phoenix 2.0