Who is the king of ETFs?

Who exactly holds the throne as the undisputed king of Exchange-Traded Funds (ETFs)? Is it the innovator who first introduced this concept to the financial world, revolutionizing the way investors approach portfolio diversification? Or perhaps it's the company that has amassed the largest number of ETFs under its umbrella, offering investors a vast array of options to choose from? Could it be the fund manager who has consistently delivered strong performance across multiple ETFs, earning the trust and loyalty of investors worldwide? Or maybe it's the regulatory body that has overseen the growth of the ETF industry, ensuring its stability and integrity? As the ETF landscape continues to evolve, who stands out as the true king of ETFs?