There is only one person who can render a judgment as to who will be the greatest in His kingdom. The King of kings decides which of the apostles will be the greatest. It will be the opposite of what they think. The least among them shall be the greatest.
The Messiah of Israel is amazing. The descriptions of Him in Isaiah tell us that He is a great champion and ruler who reigns with perfection. The reason God reveals Him in the Scriptures is so that we get to know Him. And, in knowing Him, we welcome Him as King with worship and adoration.