While Haki is incredibly important in One Piece, many characters have made it to the Final Saga without it. That said, Haki ...

Under Imu's influence, Saturn was very overpowered, but even on his own, Saturn is a top-tier character in the One Piece ...

Luffy still has a far way ahead when it comes to his haki mastery. These One Piece characters outclass him in terms of Haki.