Im saying Axel not as a fanboy/girl but as a person who respected his abilites and his adding to the plot. He portrayed a deceptive attitude at first yet at the same time kept us in the dark on his true intentions the entire time. He was both mysterious and quite the badarse at the sametime. Regarding the others, they lacked the sense of style that axel had.
Lexaeus and Zexion, we hardly learned anything about those two to be honest. Lexaeus hardly ever spoke and Zexion covered his tracks with almost every action he took so there really isnt any given amount of information on these two =/