A master that is diligent, honest, and good, but Never say die at his work as like as a bee in the wood.

The title is a twist of a proverb.

My pride of Tennou-Heika, Japanese Emperor, is he’s, our father’s, diligence.
僕が天皇陛下について誇りに思うことは、あの方（僕らにとってのお父様）がとても働き者であるということだ。
http://www.kunaicho.go.jp/activity/gonittei/01/h24/gonittei-1-2012-1.html

Is there a monarch or king who’s working as such like a laborer in any other countries or nations?