You're the only king I think the people would accept.

Additionally, the king of spades is the only king looking to the right.

He was the only king of France to be executed.

I doubt he's the only king thinking that way.

"I guess he's the only king we have, at that."

He was the only king in India to whom the British approached to sign a peace treaty.

In a country where Elvis is the only king, what are the Louis doing making themselves at home - and why now?

A man's only king as long as folks let him be.

He is the only king ever so styled in all the Irish annals.

"So would I be the only king at the wizards' school?"