No, Marvel/DC definitely counts. It is better about it, but it still counts.
I mean, for example, everybody talks about Alan Moore's Swamp Thing, and deservedly so, but nobody cares about Swamp Thing before or after Alan Moore. Alan Moore practically reinvented the character, (sucks for old swamp thing, even if his was better) but authors following him either tried and failed to miimic him or tried and failed to reinvent it. And each author, including Alan Moore, retconned and even contradicted stuff of previous authors. Its the same with most legendary runs, at best, they crystalise the character in place, a default they return to after each author change, and at worst, they get ignored by succeeding authors that destroy the series, no one being able to write well because they are using a cast another author made great. And that is the good outcome, when a series becomes great. And do not get me started on stupid editorial mandates.
DC and Marvel are better because at least you can follow the chef instead of the restaurant if you know what you are doing (wonder who wrote the articles of magic, I wanna read more of what that guy wrote) , but following any series ends in a heartbreak when the author changes.
Contrast manga and comic series with a constant author (like Invincible, Saga or the Walking Dead) where, even if they turn bad, it is a process rather than cookery. Heck, I imagine its the same with the well known Warhammer novel series (Felix and Gotrek, Ciaphas Cain) having one specific team of chef that works well together or a single chef, although as I haven't researched the subject, I may be proven wrong. I know this quest is good because Boney is a very very good QM who can turn this mess into something interesting, not because it is Warhammer.