John the Apostle
Revelation 15:4BSB·traditional attribution

Who will not fear You, O Lord, and glorify Your name? For You alone are holy. All nations will come and worship before You, for Your righteous acts have been revealed.”

Matthew Henry Presbyterian @wholebiblehenry

Here we have the preparation of matters for the pouring out of the seven vials, which was committed to seven angels; and observe how these angels appeared to the apostle - in heaven; it was in a wonderful manner, and that upon account, 1. Of the work they had to do, which was to finish the destruction of antichrist.

Commenting on Revelation 15:1-4

John Gill Reformed Baptist @doctorgill

Who shall not fear thee, O Lord,.... At this time the people of the Jews shall seek after Christ, and fear him and his goodness; the forces of the Gentiles shall be brought into Zion, whose heart shall then fear, and be enlarged; the fear of the Lord will be in all places, and in all men, both Jews and Gentiles, Hos 3:5 and glorify thy name?

Albert Barnes Presbyterian @notesbybarnes

Verse 4. Who shall not fear thee, 0 Lord. Reverence and adore thee; for the word fear, in the Scriptures, is commonly used in this sense when applied to God. The sense here is, that the judgments about to be inflicted on the beast and his image should and would teach men to reverence and adore God.