The crew was separated after the Saobody arc. Luffy decided for everyone to train hard for two years and meet again at the same place. The journey started again. All the members had refined their skills over these years. They were more powerful than before. Since then, they have taken down the strongest Warlord, Doflamingo, rescued their teammate from the Yonko, Big Mom, and are on their way to take down the Yonko, Kaido. The crew kept getting bigger and has over 5000 pirates under allegiance now. However, the main crew is ten in number. The writer of One Piece, Eiichiro Oda, has been writing this story for over two decades now. He teased that the crew will indeed reach their goal at the end of this manga. This crew may get bigger in the future as well. Anyhow, here are the Ten Straw-Hats ranked by strength:
10. Nami
Nami, the beauty as a beast, navigator of the crew, has always been the weakest among the bunch. Although she trained herself to be strong over time. She uses a device to manipulate weather using a device made by Usopp.
9. Usopp
The Sniper of the Straw Hat Crew, his aim is flawless. He may lack any physical strength, but his sniping skills are top-notch. He also awakened Kenbunshoku Haki later.
8. Chopper
Chopper has been useful as a doctor to the crew, but he also packs a punch. His different point transformation is suitable for any kind of combat. He was initially a rain-deer who ate Hito Hito no Mi, which turned him into a human.
7. Franky
Franky is a cyborg who is the ShipWright of the Straw Hat Ship. He uses modern technology like missiles and super punches and even laser. He packs a lot of endurance with this firepower.
6. Brook
Brook is a musician pirate that awakened from death by eating Yomi Yomi no Mi fruit. He is in a type of immortal state. Brook is an expert swordsman with powerful techniques associated with music.
5. Robin
Robin was a former accomplice of a warlord, where she was called Miss Sunday. She can grow huge her limbs due to her devil fruit powers anywhere. This gives her overpowering strength against most enemies.
4. Sanji
Black Leg, Sanji uses his legs to fight because he can’t dirty his hands as a cook. He has learned this kick-based martial art from a legendary pirate. He can even handle top fighters with devil fruit powers.
3. Jinbe
Jinbe is a Fishman and a former warlord who was acknowledged by the marines. He was also a member of Big Mom pirates, which he left to join Luffy’s Crew. He uses Fishman karate along with his immense fighting experience.
2. Zoro
Zoro is the first mate to Luffy. He is a swordsman who uses three swords. The greatest swordsman trained him during the time skip. After this, Zoro has not failed to cut through any opponent for his captain.
1. Luffy
He is the Captain of Straw Hat Pirates. Luffy has gathered his ten-man crew intending to become the king of Pirates. He has overcome every opponent he has faced after suitable training. His training with the first mate of the previous pirate king has proven to be very effective. He is, effectively, on his way to becoming a Yonko.