And Moses went up from the plains of Moab unto the mountain of Nebo, to the top of Pisgah, that is over against Jericho. And the LORD shewed him all the land of Gilead, unto Dan, And all Naphtali, and the land of Ephraim, and Manasseh, and all the land of Judah, unto the utmost sea, And the south, and the plain of the valley of Jericho, the city of palm trees, unto Zoar. And the LORD said unto him, This is the land which I sware unto Abraham, unto Isaac, and unto Jacob, saying, I will give it unto thy seed: I have caused thee to see it with thine eyes, but thou shalt not go over thither. So Moses the servant of the LORD died there in the land of Moab, according to the word of the LORD. And he buried him in a valley in the land of Moab, over against Beth-peor: but no man knoweth of his sepulchre unto this day. And Moses was an hundred and twenty years old when he died: his eye was not dim, nor his natural force abated. And the children of Israel wept for Moses in the plains of Moab thirty days: so the days of weeping and mourning for Moses were ended. And Joshua the son of Nun was full of the spirit of wisdom; for Moses had laid his hands upon him: and the children of Israel hearkened unto him, and did as the LORD commanded Moses. And there arose not a prophet since in Israel like unto Moses, whom the LORD knew face to face, In all the signs and the wonders, which the LORD sent him to do in the land of Egypt to Pharaoh, and to all his servants, and to all his land, And in all that mighty hand, and in all the great terror which Moses shewed in the sight of all Israel.
O come, let us sing unto the LORD: let us make a joyful noise to the rock of our salvation. Let us come before his presence with thanksgiving, and make a joyful noise unto him with psalms. For the LORD is a great God, and a great King above all gods. In his hand are the deep places of the earth: the strength of the hills is his also. The sea is his, and he made it: and his hands formed the dry land. O come, let us worship and bow down: let us kneel before the LORD our maker. For he is our God; and we are the people of his pasture, and the sheep of his hand. To day if ye will hear his voice, Harden not your heart, as in the provocation, and as in the day of temptation in the wilderness: When your fathers tempted me, proved me, and saw my work. Forty years long was I grieved with this generation, and said, It is a people that do err in their heart, and they have not known my ways: Unto whom I sware in my wrath that they should not enter into my rest.
And after six days Jesus taketh Peter, James, and John his brother, and bringeth them up into an high mountain apart, And was transfigured before them: and his face did shine as the sun, and his raiment was white as the light. And, behold, there appeared unto them Moses and Elias talking with him. Then answered Peter, and said unto Jesus, Lord, it is good for us to be here: if thou wilt, let us make here three tabernacles; one for thee, and one for Moses, and one for Elias. While he yet spake, behold, a bright cloud overshadowed them: and behold a voice out of the cloud, which said, This is my beloved Son, in whom I am well pleased; hear ye him. And when the disciples heard it, they fell on their face, and were sore afraid.
Have you ever considered that by equating Moses with the Israelites who died in the wilderness then you are equating Moses with the lost of whom it is said "They do alway err in their heart; and they have not known my ways. So I sware in my wrath, They shall not enter into my rest." (Hebrews 3:10-11). Who (contextually) are an example of the lost, who had "an evil heart of unbelief, in departing from the living God." (Hebrews 3:12) "For we are made partakers of Christ, if we hold the beginning of our confidence stedfast unto the end." (Hebrews 3:14) And the end is always till death, or being caught up/resurrected, not purgatory.
Either make Moses one of the lost, which you did with your verses, or place all these in purgatory, which somehow the author of Hebrews "forgot" to teach. The failure of Moses to enter the promised land does place him in the same class as those who did not enter into God's rest due to unbelief, nor does it place him in purgatory. And his sin was not one of ignorance which he neglected to atone for, as per the punitive premise of purgatory.