Well, contrary to the contamined popular belief, the X-Men movies had always been deeply centered on a group of characters, not a sole character. Fact is, even if THAT specific group which the movies were centered on WASN'T the "classic" X-Men roster you wanted, well, you cannot truly deny the fact that the X-Men movies were focused on the story-arc and the character-arc of a chosen GROUP of characters.

X-Men/X2/The Last Stand were about:

Professor X
Magneto
Wolverine
Jean Grey
Rogue (at least in X1)

First Class/Days of Future Past/Apocalypse/Dark Phoenix were about:

Professor X
Magneto
Mystique
Beast
Jean Grey (in the last two)


Like it or not, you cannot say these movies were NOT character-driven, despite being not focused on the other "X-Men" or the "X-Men" as a battlefield team.