I imagine nobodys to have these specific type traits and not nessasary tied to a Ff class.
Marluxia: reapers that can cast black magic such as Doom and Drain.
Vexen: nobodys that are shielded from the front and must be taken out from behind like some heartless / unversed. Each blocked hit gathers "data" and upon a few strikes will release a sort of clone of a random party member.
Larxene: very fast nobodys with combo Attacks
Zexion: another sorceress type enemy but an opposite of xemnas which liked the get close and personal, this one tries to maintain distance whilst firing random spells that can also cause status defects.
Lexaeus: tanky nobodys which get stronger as more damage is dealt to them.
I might sound dumb here but I never did understand why / how roxas had control over the ninja type nobodys (I forgot their names)
It never really was mentioned in days and the training missions and mission where you escape had them attack you. And i didnt really get how they represented him anyway.