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.
Can Gear 5th Luffy defeat Kurama's beast mode? - Quora
Luffy's Gear 5 Technique, Explained
Why Gear 4 had a downsides, but… : r/OnePiece
I drew what Luffy could look like in Gear 5 (if it happens) : r/OnePiece
One Piece: Why is Gear 5 so important? - Dexerto
One Piece: 5 Conqueror Haki Users Who Are Still Far More Powerful Than Gear 5 Luffy
One Piece: Luffy's Gear 5 Technique (Explained)
How strong will Luffy be when he gets his Haki awakened? - Quora
How does Luffy's Gear 5 compare to his previous forms in terms of power and abilities? - Quora
Who would win, Gear 5 Luffy or Base Adult Naruto? - Quora