Other notable runs that went for super long runs of 100+ issues
Lee/Kirby Fantastic Four-108 issues, 125 for Stan
Lee Spiderman- Stan Lee was on it for 108 issues
Defalco/Frenz Spidergirl-Multiple titles but ~130 issues over about 10 years
Bendis/BagleyUltimate Spiderman- They worked together for 111 issues… and then Bendis kept going on the title through the Miles years for basically a 15 year run
Roy Thomas- Conan the Barbarian. Yeah he was adapting the Howard stories, but he added so much of his own flavor and new characters its basically a unique version of the story (and my personal favorite), and he did that for 10 years/115 issue, the Savage black and white stories for 60 issues... and then he left for a decade, and then came back for another 30 issues at the end.
Over at DC the only one I can think of offhand aside from the already mentioned Superman interconnected triangle run would be
The Wolfman run of New Teen Titans. The title of the book changed multiple times along the way, as did the artists, and they also did COIE in the middle of it, but that was a solid 8 year run of about 100 issues total.
Random runs of say, Green Lantern or Blue Beetle that might have kept a creative team for 4 or 5 years, but I think about 50 issues tends to be the upper limit for most teams.
Of course if you want to go to indies, then you have Usagi Yojimbo, Savage Dragon, Cerberus, and Gold Digger to look at, which have all managed to have a single creator for decades and hundreds of issues. Cerberus finished at 300 issues. Gold Digger by Fred Perry is very close to 300, it'll be there next year... and if you count all the specials he's personally done that are part of the same story its well past 350. Usagi has been through so many publishers its hard to accurately track but its at about 200 since 1986. Eric Larsen's Savage Dragon had a multi-year hiatus while he was EiC at Imamge, but its at around 260... I stopped reading it seven or eight years ago when Malcolm took over and the series started turning into a really weird series of fetishes.