Madelyne Pryor
Madelyne Pryor was introduced during the acclaimed 1983 "Uncanny X-Men" run that saw long-time writer Chris Claremont pair with artist Paul Smith for a series of issues that would see the Jean Grey look-alike marry the retired X-Men leader Scott Summers (Cyclops).
Morgan le Fay (Marvel Comics)
Morgan le Fay first appeared in Atlas Comics in "Black Knight" #1 (May 1955), written by Stan Lee and illustrated by Joe Maneely. She was introduced into Marvel Comics in "Spider-Woman" #2 (May 1978).