master-xehanort will not be the main antagonist he is just a time travel version piece of himself but the main antagonist will be terranort...remember he has the young body he needs...so the list
1 master-xehanort,2 xehanort-heartless,3 xemnas,4 young-xehanort,5 xigbar,6 said,7 larxene,8 marluxia...