Series: Avengers (1963-2004)

Stan Lee and Jack Kirby/Don Heck.  Grade: A-.  #1-35 (1963-1966)
Roy Thomas and (mostly) John Buscema.  Grade: B+.  #36-104 (1966-1972)
Steve Englehart and various.  Grade: A.  #105-150 (1972-1976)
Jim Shooter and George Perez.  Grade: A+.  #158-177 (1976-1978) 
David Michelinie and various.  Grade: B+.  #181-187, 190-205, 223 (1979-1981)
Jim Shooter and various.  Grade: B.  #211-218, 224 (1981-1982)
Roger Stern and (mostly) Al Milgrom.  Grade: A+.  #227-250 (1983-1984)
Roger Stern and (mostly) John Buscema.  Grade: A.  #251-287 (1985-1988)
Walt Simonson and John Buscema.  Grade: B.  #291-300 (1988-1989)
Larry Hama and (mostly) Paul Ryan).  Grade: C+.  #326-333 (1990-1991)
Bob Harras and (mostly) Steve Epting.  Grade: C.  #334-351, 355-375 (1991-1994)
Bob Harras and various.  Grade: C-.  #384-399 (1995-1996)
Mark Waid and Mike Deodato.  Grade: B-.  #400-403 (1996).
Volume Two (“Heroes Reborn”).  
Rob Liefeld, Walt Simonson, Michael Ryan, others.  Grade: B.  #1-13 (1996-1997)
Volume Three/Volume One (Vol. 3 started with #1, but later was renumbered as part of Vol. 1; numbers below reflect Vol. 1 numbering).    All posts at this tag.
Kurt Busiek and (mostly) George Perez.  Grade: A- (with Perez)/B+ (after Perez).  #1-56 (1997-1998)
Howard Mackie and various.  Grade: F. #1(443)-29 (1999-2001).
Geoff Johns and Various. Grade: B-. #57-76 (2002-2004)
Chuck Austen and Scott Kolins. Grade C.  #77-84 (2004)
Brian Michael Bendis and David Finch.  Grade A.  #500-504 (2004-2005)