Moses
Exodus 23:21BSB·traditional attribution

Pay attention to him and listen to his voice; do not defy him, for he will not forgive rebellion, since My Name is in him.

Matthew Henry Presbyterian @wholebiblehenry

Three gracious promises are here made to Israel, to engage them to their duty and encourage them in it; and each of the promises has some needful precepts and cautions joined to it. I. It is here promised that they should be guided and kept in their way through the wilderness to the land of promise: Behold, I send an angel before thee (Exo 23:20)...

Commenting on Exodus 23:20-33

John Gill Reformed Baptist @doctorgill

For mine Angel shall go before thee,.... The same as before described: and bring thee in unto the Amorite, and the Hittite, and the Perizzite, and the Canaanite, and the Hivite, and the Jebusite; six nations are only mentioned, though there were seven; the Girgashites are omitted, though added in the Septuagint version; and this omission of them might be, either because they were swallowed...

Jamieson-Fausset-Brown Reformed @jfbcommentary

my name is in him--This angel is frequently called Jehovah and Elohim, that is, God.