Which writer or artist has had the longest streak working on one comic book?

It depends how you score.  Curt Swan did thousands of pages of Superman, Warren Kremer did thousands of pages of Richie Rich and Dan DeCarlo did thousands of pages of Archie…but those pages weren't always published in consecutive issues.  Swan, for example, was moved around between Superman, Action Comics, Adventure Comics, Superboy and a few other books, and even when he was pretty steadily on one book, an issue by someone else would occasionally be dropped in between his.

This really had nothing to do with Curt's productivity.  Every month, he drew 30-40 pages of whatever comics his editors had him draw.  None of his associates would doubt that, had DC decided to make the Superman comic his priority assignment, he would have drawn every issue for around 40 years and never missed a month.

The same is true of many other artists, such as Dick Dillin.  Dillin was the lead artist on Blackhawk for around 20 years, but short stories were occasionally dropped in by others because his editors wanted him to do other strips, as well.  He only stopped doing Blackhawk because DC assigned him elsewhere and then cancelled the title.  He would have done it for another 20+ years if they'd continued it and kept him there…but they decided he was needed on, among other books, Justice League of America.  He drew J.L.A. #64-183…with the exception of #153, which George Tuska did for reasons unknown.

So which of them did the longer streak?  How do we rank Jack Kirby, who did slightly more than 100 issues of Fantastic Four plus five annuals?  And you could certainly make the case for, among others…

  • Gaylord duBois and Jesse Marsh as writer and artist, respectively, of Tarzan (Dell and Gold Key)
  • Robert Kanigher as writer of Wonder Woman and Sgt. Rock (DC)
  • Irving Tripp as artist of Little Lulu (Dell and Gold Key)  John Stanley also had a long run as its writer.
  • Paul Murry as artist of Mickey Mouse (Dell and Gold Key)
  • Carl Barks as artist and usually writer of Uncle Scrooge and Donald Duck (Dell and Gold Key)
  • James F. Davis as artist of The Fox and the Crow (DC)
  • Al Hubbard as artist of Mary Jane & Sniffles (Dell and Gold Key)
  • Fred Rhoads as artist of Sad Sack (Harvey)
  • Sheldon Moldoff as artist, ghosting for Bob Kane on Batman (DC)
  • John Buscema as artist for Conan the Barbarian (Marvel)
  • Joe Sinnott as inker of Fantastic Four (Marvel)
  • Joe Certa as artist of John Jones, also known as The Manhunter From Mars (DC)
  • The team of writer Joe Gill, penciller Charles Nicholas and inker Vince Alascia, producing ghost, romance, western, war and love stories for Charlton's ghost, romance, western, war and love comics.
  • Sheldon Mayer as writer/artist of Sugar & Spike (DC)

There are many others who could be considered, including Dan DeCarlo and several of the Archie artists, and Warren Kremer and several other Harvey artists.  More recently, you have Dave Sim on Cerebus the Aardvark, Stan Sakai on Usagi Yojimbo and myself and Sergio Aragonés (and letterer Stan Sakai and colorist Tom Luth) on Groo the Wanderer.  You could arrange the rules to make any of us the winner of any endurance record.

So the answer to this question is, "Any of about thirty guys."