Biblical kings and prophets receive delegated authority, but the comprehensiveness of 'all things' and the Son's relation to eternal life exceed ordinary prophetic agency.
Psalm 2 and Daniel 7:13-14 contribute royal and heavenly-authority background.
John gathers heavenly origin, Spirit-giving, universal authority, and eternal life around the Son.
The concentration of divine roles makes this a strong cumulative statement of Jesus' unique status.