Drama with a powerless king or prince

I asked for recommendations for this not too long ago and got quite some good replies! Here's the link.

My all-time favourite recc would be Secret of Three Kingdoms. ML is the puppet emperor during a complicated political time and struggles a lot to regain his power. 

• The Legendary Life of Queen Lau - Comedy but ML is also a puppet ruler and has to obey the prime minister
• Dong Lan Xue -  Minidrama. Unfavored prince trying to regain power
• Kingdom & Kingdom Season 2 - It's more of a secondary arc but also about a (crown) prince who holds no power and must gain it throughout the drama.