Gigapede

Dragon

Also a Dragon

Dragon Heartless
Xemnas Dragon also exists too I guess

Big skeleton bird heartless in Port Royale

I'm told the second Baldr fight features this

Sandbird (might cheat the enemy aspect but eh)

kind of, sort of, I guess the big flying nobody at Marluxia's final phase is part of Marluxia, sure whatever

Deathwing

Final Boss

Someone reminded me that the piece of shit Saviour boss fits the criteria so fuck

Valentine