The better question should be: Which mangaka was carried by their early editors the most? Whenever you see these long-running series who start to adapt themes and ideas near the end that clash with what they were portraying at the start of the series, it's usually because their original editors were responsible for a lot of the ideas that made their manga initially so popular, and as these mangaka became household names, their new editors had less and less power to reel them in, and they could basically do whatever they want.
Honestly, Kubo is probably the worst example of this. The Thousand Year Blood War arc reads like: "Kubo mostly just did what he wanted, and his editor was just along for the ride."