One Piece wins and it isn't even close.
Naruto had a great first half, the second part of it however even though it had great moments and even arcs, it became annoyingly bad and filled with nonsense near the end, seemed like Kishimoto is bored of his own story.
Bleach like Naruto had a decent start, it peaked fairly quickly then it went downhill fast, the fights in Bleach later on are basically two characters trying to win in an asspull fight, you have no idea what's happening and neither does Kubo, but at least it looks cool.
One Piece had the weakest start, but it improved quickly and it's peaks as well as consistency over time is miles above Naruto or Bleach.
Naruto had a great first half, the second part of it however even though it had great moments and even arcs, it became annoyingly bad and filled with nonsense near the end, seemed like Kishimoto is bored of his own story.
Bleach like Naruto had a decent start, it peaked fairly quickly then it went downhill fast, the fights in Bleach later on are basically two characters trying to win in an asspull fight, you have no idea what's happening and neither does Kubo, but at least it looks cool.
One Piece had the weakest start, but it improved quickly and it's peaks as well as consistency over time is miles above Naruto or Bleach.