Yahweh is the Head Angel in the Old Testament Exodus 23:20,21

Yahweh is the head angel in the Old Testament 

or Yahweh is the archangel Michael

Epiphanius Against Basilides, Basilides 2:3 He says that this creation was produced later by the angels of our heaven and the power in it. One of these angels he calls God and distinguishes him by saying that he alone is the God of the Jews—though he made him one of the number of the angels whose names he coined for us as though he were composing a mime.8 By him the man was fashioned.9

https://web.archive.org/web/20170916133936/http://www.masseiana.org/panarion_bk1.htm#31.

Yahweh is the head angel in the O.T....right? Christ has assumed the position higher than the angels.

Exodus 23:20,21 20 “See, I am sending an angel ahead of you to guard you along the way and to bring you to the place I have prepared. 21 Pay attention to him and listen to what he says. Do not rebel against him; he will not forgive your rebellion, since my Name is in him.

There is an angel who is called Yahweh Exodus 23:20,21

This angel is the chief angel or archangel Michael whose name means who is like the Divine One (God) EL or power

Daniel 10:13 But the prince of the kingdom of Persia withstood me one and twenty days; but, lo, Michael, one of the chief princes, came to help me: and I remained there with the kings of Persia.

Yahweh is said to have appeared to Abraham as he sat in the door of his tent. (Gen. 18:1) When he first saw the visitor, though, he did not see the Lord but “three men” or Elohim, of whom one was the chief. Read all of Genesis 18 to 19:29 and you will see that the Everlasting Deity talks and acts by or through these Elohim, but chiefly through one of them called the Lord God or Yahweh Elohim. (Elpis Israel)

God appears to Jacob in Genesis 35:9 and says in the second verse: “I am God Almighty.” In the thirteenth verse we see God went up from the place where He talked with Jacob. At the time, he was at Bethel where the Elohim were previously revealed to him. On that occasion he dreamed he saw a ladder reaching from Earth to heaven with “the Lord standing above it, and the Elohim of God ascending and descending.” These messengers or angels were the Elohim or “ministering Spirits sent forth to assist those who will inherit salvation.” (Heb. 1:14) On another occasion (Gen 32:24-30) Jacob is said to have encountered the “Invisible God” when he wrestled with one of the Elohim. (Elpis Israel)

Gen 32:30 So Jacob called the name of the place Peniel: "For I have seen God (the Elohim) faces to faces, and my soul is preserved."

Ho 12:3  He took his brother by the heel in the womb, and by his strength he had power with God: Ho 

12:4  Yea, he had power over the angel, and prevailed: he wept, and made supplication unto him: he found him in Bethel, and there he spake with us;

Gen 35:1 ¶  And God  (Elohim )<0430> said unto Jacob , Arise , go up to Bethel , and dwell  there: and make there an altar  unto God (EL) <0410>, that appeared  unto thee when thou fleddest from the face  of Esau  thy brother .

Gen 35:1 Then the Elohim said to Jacob, "Arise, go up to Bethel and dwell there; and make an altar there to the One True El, who appeared to you when you fled from the face of Esau your brother."
2 And Jacob said to his household and to all who were with him, "Put away the foreign gods that are among you, purify yourselves, and change your garments.
3 Then let us arise and go up to Bethel; and I will make an altar there to the One True El, who answered me in the day of my distress and has been with me in the way which I have gone."

Hence, the Elohim speak in the first person as personifications of the Invisible and Incorruptible Substance or Spirit who is the real author of all they say and do.

In Exod. 24:10, Moses tells us -- that he and seventy-three others "saw the God of Israel." We should err, however, if we supposed that he meant they saw the Deity, the Uncreated Spirit, "no man can see Him and live." He says they saw "the Elohim of Israel" the depositories and the embodiments of the Eternal Spirit, who shone out in glory in the presence of the Elders. The appearance under the feet of the Elohim, whose feet were also the feet of the Spirit, and, therefore, styled "His feet, was, as it were, a paved work of sapphire stone, and as it were the body of heaven for clearness." The whole was a Spirit-manifestation.

The order was that "Moses alone shall come near YAHWEH," with his attendant. The reader will perceive the distinction here between the Elohim and YAHWEH. The nobles of the children of Israel came nigh to the Elohim, and saw them; and did not see Him. Even Moses, who did come near to the glory of Yahweh did not see His face; for said he, "there shall no man see me, and live; thou shalt see my back parts, Moses, but my face shall not be seen" (Exod. 33:20). Paul testified the same thing in 1 Tim. 6: 16, saying: "God, the blessed and only Ruler, the King of kings and Lord of lords, who alone is immortal and who lives in unapproachable light, whom no one has seen or can see..." The Hebrew nation saw the symbol of YAHWEH'S presence on the mountain top "The glory of Yahweh like devouring fire," but neither they, Moses, nor their nobles, saw the face of the Eternal Substance himself.

The glory of Yahweh was manifested to Moses through the medium of the One from whom he received the Law (see Exod.. 33:18-23; 34:4-8; 24:12-18). This was the work of an angel as Paul and Stephen reveal (Gal. 3:19; Acts 7:53). Moses saw in him "the similitude of Yahweh" (Num. 12-8). Yahweh's Name was named upon him (Exod. 23:20-23) so that he exercised greater authority than the other Elohim as Christ will exercise greater authority than his glorified brethren

The distinction between Yahweh and Elohim is revealed in the incident recorded in Exodus 24. Moses was told that he, alone, "shall come near Yahweh" (v.2), but the elders of Israel were not permitted to do so. Yet, v.11 states: "The nobles saw God (Elohim) and did eat and drink." Neither Moses nor the nobles saw the great eternal and invisible spirit the Father. The former saw His glory revealed through an angel of Yahweh (probably the one referred to as bearing the Name according to Exodus 23:20), so that it is stated, "the similitude of Yahweh he beheld" (Num. 12:8). On the other hand, the nobles of Israel "saw God," or Elohim of lower status (though of the same physical constitution) as the one who appeared unto Moses, as recorded in the earlier verse.

John 1:18 And of His fullness we have all received, and grace for grace. 17 For the law was given through Moses, but grace and truth came through Jesus Christ. 18 No one has seen God at any time. The only begotten Son, who is in the bosom of the Father, He has declared Him

Verse 18: No man hath seen the Creator at any time. "God" meaning "elohim" refers to angels. See Exod# 33. 11, 20. The showing of YHWH to Moses was the showing of a highly placed angel, typifying that the people would see the manifestation of God in Jesus.

Jesus of Nazareth. His whole life, all his teachings, and especially his death and resurrection and ascension to heaven, all "declared" his heavenly Father.