Nobody has ever seen God. This is likely due to God's invisibility.
John 1:18
According to the Bible, anybody claims to have seen God is a liar. This would include that Joseph Smith fellow.
Exodus 33:21-23
21 And the Lord said, Behold, there is a place by me, and thou shalt stand upon a rock:
22 And it shall come to pass, while my glory passeth by, that I will put thee in a clift of the rock, and will cover thee with my hand while I pass by:
23 And I will take away mine hand, and thou shalt see my back parts: but my face shall not be seen.
Exodus 33:11
11 And the Lord spake unto Moses face to face, as a man speaketh unto his friend. And he turned again into the camp: but his servant Joshua, the son of Nun, a young man, departed not out of the tabernacle.
Genesis 32:30
30 And Jacob called the name of the place Peniel: for I have seen God face to face, and my life is preserved.
Deuteronomy 34:10
10 And there arose not a prophet since in Israel like unto Moses, whom the Lord knew face to face,