I'm actually pretty surprised that you think One Piece doesn't have any planning. I'll grant that for the most part, each island the Straw Hats go to has its own thing going on, which they inevitably wind up involved in. But in terms of the overarching plot of the manga, there are lots of elements hinted at in the first hundred chapters that are only being revealed in full now. Not sure how up to date you are, but stuff like Haki, the will of D, the true origin of the World Government and the Lost Century, and Luffy's father were clearly planned out hundreds of chapters in advance of them being actually important to the plot. So while the adventures on one island might not have a lot to do with the adventures on the next, the overall plot is very complex and tightly woven.
Can't say I disagree with you about Bleach, Naruto or Dragonball, though. Naruto's probably the best at plot planning out of the three of those, and it's still pretty terrible at it. I think part of the problem there is that the creators only had the plot planned out for the first hundred chapters or so, and once the series kept going beyond that they just kind of had to make it up.
Anyhow, there are definitely some manga that don't have that particular problem. If you have a mind to, check out Monster, Planetes, Vinland Saga or Berserk. Those are all very good seinen series where the effort put into the plot really shows. Although if you try Berserk, I should warn you that I found the first three volumes to be a bit of a slog. It's amazing after that, though.