I think what people are missing about the final panel of characters is that it's simply people directly hunting the One Piece and Oda telling us they're the big players left in the game with an endgame adjacent to the One Piece (directly related to the One Piece). Others like Zoro, Mihawk, Croc, Kidd, Law, Fujitora, Greenbull, etc. don't have goals that end with the One Piece. Kidd and Law are the best examples excluded in the panel - they have been eliminated from the One Piece hunt.