The Last Trumpet: Short and to the point

[Jeffrey Bowden]

I've heard a lot of post trib point out "the last trump" from 1 Corinthians 15 and then claim it's Revelation 11's 7th trumpet
but.... in multiple places in the bible it's God who blows the trumpet at His return, not an angel.

You are correct. The 7th trumpet (Rev 11:15) precedes the seven bowl judgements (Rev 15:6). The trumpet in 1 Th (Thess) 4:16 solely raises the dead in Christ to start the rapture.