With Gear 5, Monkey D. Luffy has become one of the strongest characters in One Piece. But still there are people who are stronger than him.
One Piece: All Haki Types and Its Subforms (Explained)
One Piece: Luffy's Gear 5 Technique (Explained)
One Piece: Why is Gear 5 so important? - Dexerto
One Piece Manga: Is Gear 5 Luffy's final power-up?
What is the difference between Conqueror's Haki and Gear Fourth in the One Piece anime? Who is stronger, Luffy or Shanks? - Quora
Naruto vs One Piece: Can Gear 5 Luffy solo the entire Narutoverse?
One Piece: 5 Conqueror Haki Users Who Are Still Far More Powerful Than Gear 5 Luffy
Strongest Busoshoku Haki Users In One Piece
One Piece Characters That Could Struggle Against Luffy's Gear 5
Who would win, Gear 5 Luffy or Base Adult Naruto? - Quora
One Piece: 5 Conqueror Haki Users Who Are Still Far More Powerful Than Gear 5 Luffy