Interpretations
-In the Quran
-In the Book of Mormon

Who was the greatest prophet?

Moses Deuteronomy 34:10 And there arose not a prophet since in Israel like unto Moses, whom the LORD knew face to face.

John the Baptist Matthew 11:11 Among them that are born of women there hath not risen a greater than John the Baptist. Luke 7:28 For I say unto you, Among those that are born of women there is not a greater prophet than John the Baptist: but he that is least in the kingdom of God is greater than he.

Jesus John 10:8 All that ever came before me [Jesus] are thieves and robbers. (This would include John the Baptist, along with Moses, David, Solomon, and all of the Hebrew prophets.) Hebrews 3:1-3 Christ Jesus ... was counted worthy of more glory than Moses, inasmuch as he who hath builded the house hath more honour than the house.

From Zondervan's NIV Quest Study Bible, (2003), p.297

Was Moses the greatest prophet ever? (34:10)

Yes, for two reasons:

(1) He had an intimate relationship with God. While God spoke to other prophets through dreams and visions, he spoke to Mosesface to face. ...

(2) No other prophet performed miracles that matched the greatness of those during the exodus. Jesus alone has been found worthy of greater honor than Moses (Heb.3:3).