Brigham teaches the leader in Heaven is Adam, and the Adam-God doctrine was taught by Joseph.
Brigham Young, May 14, 1876, in Journal History CR 100 137, Church History Library
Is there in the heaven of heavens a Leader? Yes, and we cannot do without one and that being the case, whoever he is may be called God. Joseph s<a>id that Adam was our Father and God, and himself, being a leader, he too was their God.