One Piece: We already have the Four Gods, so my Six Paths Sage is reasonable, right?

Ron was transported to the world of One Piece. He originally planned to join Roger's crew and gradually improve his strength, but he was rejected because of his questionable conduct.
It didn't matter. He turned around and joined the Rocks Pirates. As he grew stronger step by step, he also learned more and more about the truth of the world.
Sun god? Rain god? Earth god? Forest god?
Ron was dumbfounded. Was this still One Piece? How did it get to the Mythical Era?
Ron: "shinixiankaide (You opened it first)"