John the Apostle
Revelation 1:13WEB·traditional attribution

And among the lamp stands was one like a son of man, clothed with a robe reaching down to his feet, and with a golden sash around his chest.

Albert Barnes Presbyterian

Verse 13. And in the midst of the seven candlesticks. Standing among them, so as to be encircled within them. This shows that the representation could not have been like that of the vision of Zechariah, () where the prophet sees "a candlestick all of gold with a bowl upon the top of it, and his seven lamps thereon." In the vision as it appeared...

John Gill Reformed Baptist

And in the midst of the seven candlesticks one like unto the son of man,.... By whom is meant not an angel, for he speaks of himself as a divine Person, as the Alpha and Omega, the first and the last, phrases not applicable to any created beings; and of himself also as having been dead, which angels are not capable of, and of living...

Jamieson-Fausset-Brown Reformed

His glorified form as man could be recognized by John, who had seen it at the Transfiguration. in the midst--implying Christ's continual presence and ceaseless activity in the midst of His people on earth. In Rev 4:1-3, when He appears in heaven, His insignia undergo a corresponding change yet even there the rainbow reminds us of His everlasting covenant with them.