I see mysticism in Joseph Smith and his work at nearly every turn. Joseph united his mind and consciousness in God to such a great degree that he spoke with the voice of Christ. One only does that if one is genuinely in mystical union with God, or delusional, or a con man (a fake). I perceive Joseph was the first, and I'll share a few reasons why.
I perceive that when Jesus introduced the "communion" of the bread and wine, it wasn't so that we would remember only the person Jesus, per se, but the whole of God's creation, the Universe, that Jesus realized he was One with. It was all his "body."