[quote=Draconilian]
The problem is that in KH being a keyblade wielder is the highest position somebody could have, unless I play a Nobody that created it's own heart over time or something there is no way any random character could match a key-wielder in power.
[/quote]

Just a note about this: Dream Drop Distance (the 3DS game) confirms that Nobodies just kind of screw around a bit before regaining their hearts over time. It's not really clear how, but most of Organization XIII regain their hearts and return to their former selves during the first act of Dream Drop Distance