Ancestral East Africans have nothing to do with this particular thing. That is a separate diversity. Natufian is of a deep mainly Paleolithic Southwest Asian that came some 23,000 into the Nile Valley mixed with Antient North African (a distinct but deep North African ancestry) and Iberomarusian which is Paleolithic southwest Asian backmigration mixed with Ancient North African. So, paleo-SW+ANA+IBM (half paleo-SW + half ANA) is our non-Dinka-like ancestry and also majority of Natufian ancestry, only that the migration into the Levant received genetics from some Anatolian hunter-gatherer-like genetics in the Levant. The Old Kingdom is basically a variation of Natufian minus the Levant mix (basically the people before they migrated to the Levant). So is ours. But I expect there to be some slight variation within that cluster in Nile Valley as well, though this is not so important in this macro discussion. But we are Cushitic, which means all of our DNA (exept minor admixture much later) is one coherent component that is based on two clusters (simplified) of divergent people coming together.