1. Sengoku - his intelligence was seen in marineford when he used his tactics against whitebeard pirates. He planned to trap the WB pirates, first in ice and later with high walls.
Vegapunk is undoubtedly the most intelligent person in the series. While his intelligence has not been tested in the midst of a battle, it is safe to assume that a person who is considered to be at least 500 years ahead of any other person would have no problem using it in battle.
Having used his vast knowledge to create lasers, giant robots, and the Thousand Sunny's puzzle like architecutre, Franky has to have the most intelligent mind of all the Straw Hats.
1) Vegapunk
Arguably the smartest in the entire series, Vegapunk is responsible for military technology centuries ahead of the rest of the world. He's also responsible for discovering lineage factors, an ever-increasingly important concept within One Piece.
Robin - 140. she s history scientist; Nami - 135.
Given the evidence, Luffy's IQ could easily be anywhere between 90 and 130. This would make his intelligence at least average and maybe a little above average, although not quite genius-level. His morality, choices, actions and accomplishments should say as much about him.
Before awakening his Conqueror's Haki, Zoro wasn't even as strong as a top Yonko Commander, let alone a Yonko. Although he did fight Kaido and even managed to earn his praise, which is quite impressive, it was pretty clear that Zoro wasn't anywhere close to him in terms of either power or skill.
2. Ben Beckman - Oda stated that he has the highest IQ in the East Blue, so he is the brains of the red hair pirates.
The East Blue is commonly known as the weakest of all the seas. Pirates who are considered great and threatening in this sea are regarded as low rate compared to pirates from the other seas and especially in the Grand Line.
1/10 Kizaru
Kizaru is an Admiral of the Navy in One Piece and also the fastest character that we've seen in the story so far. He is a user of the Logia type Pika Pika no Mi which gives him the power to transform into light itself. All his attacks hit at light-speed, and he is able to travel at light-speed as well.
2) Tony-Tony Chopper
Tony-Tony Chopper is the Straw Hat doctor, serving as only one of two people on the ship whose education can be classified into a specialty field.
2/9 Sanji. Sanji is the second-strongest Officer of the Straw Hat Pirates and also the cook of the crew. Over the years, he has trained himself to be an incredibly competent fighter.
1) Tony Tony Chopper
However, the kindest Straw Hat Pirate is undoubtedly the ship's doctor, Tony Tony Chopper. One of the most telling reasons for his earning the top spot came during the Onigashima Raid, when Queen unleashed the Ice Oni plague.
William James Sidis (IQ: 250-300)
Sidis had the highest IQ score in history. He attended Harvard at the age of 11, which at the time made him the youngest person to ever enroll in the university, and mastered over 40 languages. Later, he left a teaching job in Texas and started a political career.
Marilyn vos Savant talks about her unique life as a super genius. Marilyn vos Savant is a national American columnist, author, company executive and, by the way, a genius. Tested at ten years old, her record IQ score of 228, the highest score ever recorded by a child, was never revealed to the public.
The infamous Nathan Leopold had an IQ of 200 and spoke nine languages by age 18, but he didn't use his intelligence for the greater good.
No two Devil Fruits grant the same power, but all Devil Fruit eaters share two weaknesses: The ocean and Sea Prism Stone. All Devil Fruit eaters lose their ability to swim after consuming the Devil Fruit.
Law's crew are notably weak compared to Luffy & Kid's to the extent that they struggle with Rayleigh's Haki at Sabaody. This is because Law was never gathering a strong crew to take the throne, he was gathering friends to travel with him until he could reach Dressrosa.
Imu is the sovereign of the World Government and arguably the strongest character in One Piece. Imu seems to have access to some kind of ability/weapon that allowed him to destroy the Kingdom of Lulusia in an instant.
For Nami, one of the most important things in a person is their kindness and the power to stand up for those who need help. Having that in abundance, Naruto fits Nami's type perfectly.
Garp is a Vice-Admiral of the Marines. Being their strongest known member in history, there's no denying that Garp is capable of taking on Kaido. He's previously fought against the likes of Rocks, and even Gol D. Roger.