Series: Uncanny X-Men (1963-2011)

Stan Lee and Jack Kirby.  Grade: B+.  1-17 (1964-1966)
Stan Lee and Jay Gavin.  Grade: C+.  #17-19 (1966)

Roy Thomas, Werner Roth, Don Heck.  Grade: D  #20-43 (1966-1968)

Arnold Drake, Heck/Roth/Steranko/Smith.  Grade: B+.  #49-54 (1968)

Roy Thomas and Neal Adams.  Grade: A+.  #56-66 (1969-1970)

Len Wein, Dave Cockrum.  Grade: A+.Giant-Size #1 (1975)

Chris Claremont and Dave Cockrum.  Grade: A #96-113 (1975-1976)

Claremont and John Byrne.  Grade: A+ #114-143 (1976-1981)
Claremont and Cockrum.  Grade: A.  #139-164 (1981-1982)

Claremont and Paul Smith  Grade: A.  #165-175 (1982-1983)
Claremont and John Romita, Jr.  Grade: B+.  #175-211 (1982-1987)