All the other prophets sinned. The only “man” to walk this earth and not sin was Jesus. If he was only a prophet, why was he the only one who was holy? If the rest of the other prophets did not sin, they would have been holy. Only Jesus was holy. Only God is holy. If the prophets did not sin, each one of them would be Gods (with capital G).
Near the very end of wandering for 40 years, in a moment of anger and a lapse of judgment, Moses sinned, and God recorded that it led Him to refuse to allow Moses to enter the promised land.
The prophet Isaiah spoke of his sinful nature:
“Then said I, Woe is me! for I am undone; because I am a man of unclean lips, and I dwell in the midst of a people of unclean lips: for mine eyes have seen the King, the LORD of hosts.”Isaiah 6:5 KJV