Luffy. There is no doubt that Luffy is the strongest and most powerful Straw Hat Pirate in existence. Luffy has always been considered one of the best fighters in all of One Piece, something that he proved more than once during the Land of
1 Monkey D.
Luffy is the by far the strongest member of the Straw Hat Pirates. As the Fifth Emperor of the Sea, Luffy is incredibly powerful and is able to hold his own against the Yonko of the One Piece world.
Of all the Straw Hats, Zoro is by far the most loyal, and he has strong leadership and reasoning skills.
He said that he cannot fulfill his dream if he does not help his captain fulfill his. Zoro seems to have the most respect and loyalty for Luffy, not only as a captain but due to their mutual understanding of each other.
Luffy, Zoro, and Sanji have pulled off some amazing things over the years. This is why they're the Straw Hats' "Monster Trio". The Straw Hat Pirates are a powerful crew that hail from the East Blue, the weakest of all the seas in the One Piece world.
Eclipsing Zoro in both mastery of Armament and Conqueror's Haki, Luffy proves himself stronger than Zoro overall. While Zoro does edge out a victory in terms of strength and physical endurance, Armament and Conqueror's Haki are undoubtedly the two more relevant factors here.
Against Shanks, even if Luffy possesses weaker Haki, the Devil Fruit abilities of the Hito Hito no Mi, Model: Nika can make up for the deficit and see him emerge victorious. Currently, however, Shanks is likely stronger than Luffy, simply due to the fact that the plot demands that of him.
That said, there is one crew member who stands above the rest in terms of loyalty to Luffy: Roronoa Zoro. The Straw Pirates' first mate has proven his loyalty on numerous occasions throughout the series, even putting his crew mates' well-being above his own life.
Monkey D.
Luffy is the most popular character of all time in One Piece. He is our adored main character, and right now he is enjoying the time of his life while getting OP. Luffy set off on his quest to become the next pirate king, and he is headed in the right direction.
Zoro is perceived as the vice captain of the Straw Hats. He is arguably Luffy's most loyal crewmate. He has displayed the most respect and dedication to Luffy by following his orders, proclaiming promises, and being the most vocal about Luffy achieving his dream of becoming the Pirate King.
Throughout his journey Luffy has made strong bonds with numerous women. At least two have fallen in love with him, Alvida and Hancock, whilst another two have become enamoured with him, Rebecca and Shirahoshi. Nami, Robin and Vivi all share close and deep bonds with Luffy and have become some of his closest friends.
Buggy is the captain of the Buggy Pirates and one of the Four Emperors of the Sea. A person who has not met Buggy can easily be fooled by his titles, but those who have know that he is one of the weakest characters in the series.
Dragon is said to be the world's worst criminal and the most wanted man ofc... Due to his status, the majority of us think that he is the strongest person alive in the OP world..
When the Straw Hats finally brought down the Donquixote Family, Orlumbus swore his loyalty to Luffy and became a part of the Straw Hat Grand Fleet. He's the captain of the seventh ship of the Straw Hat Grand Fleet.
Nami and Usopp are the two strawhats Luffy has the closest relationship with. This isn't disregarding the other strawhats as not being close, rather this is more like the two Characters Luffy is always seen around.
Finally, coming to Big Mom, the most powerful villain faced by Luffy so far. Charlotte Linlin, known as Big Mom, is the captain of the Big Mom Pirates, and she is one of the Four Emperors ruling the New World.
Bartolomeo is Luffy's biggest fan and also the other Straw Hat members who display their posters on his ship. Bartolomeo also became part of the Straw Hat Grand Fleet after the incident at Dressrosa.