For me it's Beast at the moment, because Moira's Krakoa story has a little more to go and I think somewhat of a redemption is on the horizon. Beast's...
She is the easiest to fix and the one who actually had the least done to. Karima was simply 'possessed' and all it takes is purging/reverting the OS...
All around the same time in the summer of'77 when I was 8, I got a hand me down comic, a copy of X-Men #84 (one of the pre-New X-Men reprint issues)...