I'll say Riku.I know Sora would be the obvious choice,but he's only strong because he's the main character and we have to play for him. He's a GaryStu actually. His strength is totally urealistic.I like how Riku got hurt a lot,but still kicked ass.It was more realistic. Take the keyblade( a weapon that doesn't belong to him in the first place)away from him and he's nothing. (I like Sora its just his strenght I'm talking about.)
Strongest Org. members
Xenmas(obviously)
Saix- confirmed second in command.Is insane when he fights.Axel is extremely afraid of him,the rest respect him,and in the novels even Riku says he's very strong after battling him.
Marluxia- I doubt Xenmas would have put a weakling as Lord of Castle Oblivion
Axel is one of my fav. characters,but this has to be said I'm not about to delude myself. Axel is not strong. He's a coward.
Both Sora and Roxas beat the crap out of him to the point he was obviously barely standing up after every battle with them.
In Re:com Marluxia was holding his own against Axel,and one hit from Marluxia's power had Axel struggling against it while Axel literally couldn't touch Marluxia.
He took out Vexen,and had the replica take out Zexion when they were severely weak and defenseless. That's not the mark of a strong person that's the mark of a person that will only hit you when your down.a.k.a. coward. I would love to have seen him fight them at full strength like it should have been,but I see fair isn't Axel's style. Sadly, he loss a lot of respect from me when I saw those cut-scenes.
In the novels Saix hit Axel with one hit,and he started to fade. The only reason why he didn't is somehow Namine brought him back.Another scene in the novel has Axel confirming that he could never win against Saix and he takes off running including when he was in Hollow Bastion in the game. Lastly, in the novels Saix beat the crap out of Axel so badly to the point that he was severly weak when he met Sora in betwixt,and between.
In the new cut-scenes it 's obvious he's scared of Xenmas.
The only thing Axel's good at is running or getting you when your weak,and can't defend yourself properly. Which makes him a coward,but a smart coward. His running and backstabbing did keep him alive for a while.