'Mighty Angel' in the Bible

And to you who are troubled rest with us, when the Lord Jesus shall be revealed from heaven with his mighty angels,

with his mighty angels, in flaming fire, taking vengeance on those who know not God, and who obey not the gospel of our Lord Jesus Christ:

I also saw a mighty angel proclaiming in a loud voice, “Who is worthy to open the scroll and break its seals?”

And I saw another mighty angel come down from heaven, clothed with a cloud: and a rainbow was upon his head, and his face was as it were the sun, and his feet as pillars of fire:

And a mighty angel took up a stone like a great millstone, and cast it into the sea, saying, Thus with violence shall that great city Babylon be thrown down, and shall be found no more at all.