This question is a thinly disguised question of, "Who is Michael the Archangel?"
There is a lot of information about this question and it is hotly debated with some sides taking almost hysterical positions. What is the Biblical evidence?
1 Thess 4:16 lists three things that will result in the raising of the dead all issued by the "Lord Himself", Jesus Christ at the time of His second coming:
- Loud command - compare John 5:28, 29 when the voice of God raises the dead
- Archangel's voice - "archangel" simply means "leader of angels" which is a description applied to Jesus in Matt 13:41, 24:31, Mark 13:27
- Trumpet of God, compare Matt 24:31
We must also observe that:
- it is only Jesus who raises the dead and gives life, not a mere angel, however great.
- Jesus appears to be often called a messenger in the OT - see appendix below
- the pre-incarnate Jesus appears to be also called "Commander of the heavenly host" in Josh 5:13-15.
Thus, it appears that the three rapid-fire activities described in 1 Thess 4:16 are all from "The Lord Himself", especially when compared with the closely parallel passage in Matt 24:31.
APPENDIX - Angel of the LORD
The following passages make it clear that the “Angel of the LORD” is almost always, the LORD (Jehovah) Himself, probably Jesus in particular. Gen 16:7-13, 22:11-17, 32:24-30, 48:16, Ex 3:2-6, 32:34, Num 22:22-35, Josh 5:13-15, Judg 2:1-4, 6:11-23, 13:3-23, Isa 63:9, Dan 3:25, 28, Hos 12:4, 5, Zech 3:1-7, Mal 3:1, Rev 8:3-5, 10:1-10, 18:1, 20:1-4.
A closely related phrase, “Angel of God” who is clearly God as in Gen 6:13, 8:15, 9:8, 17, 15:13, 17:3, 4, 21:12, 16-21, 35:1, 10, Ex 4:3-8, 6:2, 23:20, 21, Deut 1:6, 1 Kings 12:22, etc. See also Acts 10:3, 4, Gal 4:14.
In Isa 63:9, “the Angel of His [LORD’s] presence saved them”, and is almost certainly a reference to the same being. The same is true of Ex 23:20, 21, Josh 5:13-15.
In view of the clear statements in John 1:18, 5:37, 6:46, 1 John 4:12 that no one has seen God the Father, and the numerous cases listed above of people seeing the LORD and the Angel of the LORD, etc, it appears that these epiphanies were of the pre-incarnate Jesus.
In other places we see that the LORD sends the LORD:
- Zech 2:6-12 – the LORD (= YHWH) claims three times that He has been sent by the LORD.
- Isa 48:11-16 – again, the LORD has been sent by the LORD.
Thus, unsurprisingly, Jesus is the messenger to the human race and underlines the importance that the Godhead places upon such messages.
This is not to suggest that Jesus is an angel in the sense that He is less that God; far from it! However, the Greek and Hebrew word for “angel” simply means messenger and it is in this sense that Jesus is the messenger in the above passages.