Trappers near Redding.
those Marauder girls around ncr. (USED to be enslaveable prewipe, idk wtf happened)
Followers of the Apocalypse around adytum etc.
And lastly, I would LOVE to see one or a couple types of mercenaries from Mercenary encounters around San Fran enslaveable, so far, nothing over there is enslaveable, which SUCKS.