BC will reach it. I don't read it anymore but I could completely sense that it would be a long series as long as remained popular enough to not be cancelled.
Dr. Stone could reach it, but the pace is quite fast. I won't spoil it here, but I'm assuming some more 150 chapters at least. To reach 400 would be a bit tough, but it is possible.
BnHA can reach it more easily, but maybe it wouldn't be the best case. We need to see the next arc, will probably be decisive to have an idea about final length.
That's one of the problems of this last gag-filled entries. They seem to have a reduced scope. Going to long-shots, looooonge long-shots, actually I could see a scenario in which Cop and Dolphin reaches it. Really. It just depends on how they want to broaden the story. It it stays low-scale, then it's fast (I'm considering that it wouldn't be cancelled of course).
Of course, we have no clue if Honomieru will even pass 20 chapters, but it really is shonen-like. Could be long as well.