There is the issue of being and then the issue of position. The attributes of being “God”, at a minimum, are being eternally existent and being omnipresent, omnipotent and omniscient. This does not preclude a hierarchy of authority among those who are otherwise equal in their nature of being/existence. (ie, being eternal/uncreated).
I am of the opinion that in eternity past, before the dawn of creation, that the idea of hierarchy was unnecessary or irrelevant. Each person is identical and indistinguishable in being, and all are completely harmonic with the thoughts and will of the other. Hierarchy is only necessary in relation to human/temporal reality, not in purely divine/eternal reality. The need for hierarchy is a purely subjective application, not a natural necessity.
Doug