Series: Journey Into Mystery/Thor (1952-2004)

JiM ran as a creature feature until #83, when it introduced Thor.  It later became “Journey Into Mystery With Thor” and then, with #126, became, simply, “Thor.”  It ran as Thor until issue #502 in 1996, when it again became Journey Into Mystery.  Eventually it reverted to Thor again until #621, when Thor “died” and the book closed out its run with a “Dissembled” tie-in.  Journey would return over a decade later, but I’ve covered that run separately as its own volume–even though it picked up numbering from this book. 
Stan Lee and Jack Kirby.  Grade: B+.  Journey Into Mystery/Thor #83-181 (1962-1970)
Stan Lee and John Buscema.  Grade: B.  #182-192 (1970-1971)
Gerry Conway and John Buscema.  Grade: B.  #193-238  (1971-1975)
Len Wein and John Buscema.  Grade: C-.  #242-259 (1975-1977)

Len Wein and Walt Simonson.  Grade: C.  #260-271 (1977-1978)

Roy Thomas and John Buscema.  Grade: C-.  #272-278, 283-298 (1978-1979)

Doug Moench and (mostly) Keith Pollard (to #324).  Grade: F.  #303-328 (1979-1983)