I believe that as you search and research scripture, the answer to that question is - the choir! In a day when many churches seem to be disbanding the choir, we need to answer the question: Is the choir man's idea or God's idea? When things begin in the mind and heart of God, I think it is safe to assume permanence in His plans and principles. Dave Williamson, long time worship leader and arranger, has been at the forefront of teaching and training this biblical principle.
It is very clear in 2nd Chronicles 5 that the choir is to be God's lead worshipper. That is a huge responsibility given by God. It is His intent. That is the very reason we call our choir, The Worship Choir. I have taught and believed for many years that the worship choir is not about performance, but leading people to the throne to experience God in worship. They don't sing for the people but encourage and lead all the people of God to worship Him!
The choir is not only seen as the lead worshipper by God, but as God's lead warrior. We find this in 2nd Chronicles 20. In v. 22 we see that when they began to sing and praise, the Lord set an ambush. I have come to the belief that Satan hates praise of the living God. I even saw evidence of that profoundly on the mission field. There is victory in praise. We as God's people need to come to an understanding of that scriptural principle. Please pray for the Worship Choir Ministry in your church. mjm