Excluding Prof X and Magneto, when I think of the most consequential X-characters since the franchise's inception, I feel like these three have a separate tier than the others. Consistently major players, leaders through the years, and lots of character development. The only ones I think come close are Kurt, Pietro, Jean, Rogue, and Emma. But IMO these guys either often took a sidelined role or were missing for too many years to really be on the same caliber.
Feels pretty cut and dry to me. Just wondering if anyone disagrees.