No one.
When we see passages that say "angel of the LORD, it is called a Christophany, an appearance of God in the form of a man or angel. The pre-incarnate Christ appeared many times in the Old Testament. How do we known it is not just an angel? Well for instance in Gen. 16:13, Hagar says, "You are the God who sees me." It was God appearing in physical form. GOD told her He would increase her descendants - angels can't do that. He also comforts her. Other passages you quoted are more examples: Gen. 18:1-3;
Gen. 32:24; Ex. 3:5 (receiving worship), Ex. 23:21 ( forgiving sin); Judges 6:11-14, 13:22.
Shadrach, Meshach and Abednego survived a firey furnace with who do you think? Outside they saw a fourth man with them. They did not know what they saw. It was God in the form of a man. Angels come in the form of a man as well. Man could only conceive that it was an angel, He looked like one, but again, angels are not worshipped, they cannot create an increase of one's descendants, they cannot forgive sins.
Remember the Prince and the Pauper? Folks did not know they were in the presence of a Prince, because he came down below their level. Jacob was wrestling with someone who he thought was a man or an angel but it was the LORD, Whom he received a blessing from.