Ok, I've made it into a team roster through 315.  Someone more familiar with the later issues will need to do the rest.
Some notes:
(1) Professor X is rarely a member of the team.  Thus I've removed him generally.  During the Gold Team period it could be argued he deserves a listing.  There's also a brief period from 184-200 where he is very occasionally engaged in field activities with the X-Men, but its 1-2 isolated issues, not a consistent trend.  If anyone wants to make an argument for his inclusion *on the team roster*, here is the place to do it, but assumption should be against including him unless he's explicitly on the team.
 Magneto is similarly never a member of the X-Men team in the #200-225 period, but is instead Headmaster of Xaviers, and is also excluded.
(2) This wikipedia page is for the comic Uncanny X-Men (and under various former titles), not the characters or the team.  As such, it should be about the publication and reflect the publication history.  Among other implications, I've chosen to omit reference to the Changeling impersonating Professor X and the Phoenix Force impersonating Jean Grey, because both of them had nothing to do with the book *as published* for the issues they are supposed to have appeared in.  (The Changeling is of course also omitted because Professor X wasn't actually a member of the team at that time).
(3) For characters whose absences are of brief or intermittent duration, I've tended to leave them on the team roster rather than have a lot of quick team changes.  Similarly, in time periods where multiple characters join or leave the team in short order, I've tended to agglomerate all those changes into one change, and thus a character may join or leave the team shortly after the start of the listing or before the end of the listing.
69.209.61.152