NET
15 —whose appearing the blessed and only Sovereign, the King of kings and Lord of lords, will reveal at the right time.
Darby
15 which in its own time the blessed and only Ruler shall shew, the King of those that reign, and Lord of those that exercise lordship;
KJV
15 Which in his times he shall shew, [who is] the blessed and only Potentate, the King of kings, and Lord of lords;