Colossians 1:15 tells us,
[The Son] is the Image of the invisible God, Firstborn of every creature
The word "Firstborn" in this verse includes God's Son in the group of which He is the Firstborn, the creature group.
Trinitarians don't like this, but they can't muster a good argument against it, especially since the firstborn, throughout the Scriptures is always part of the group of which it is firstborn, whether firstborn in time or firstborn in status.
One of God's greatest glories is His power to create. And His greatest creation is His Firstborn Son. Don't let those in OrthoBOX Christianity diminish our heavenly Father's glory.