Reddit reviews Agincourt: Henry V and the Battle That Made England

This book https://www.amazon.com/King-Whisperers-Behind-Throne-Rasputin/dp/B008SLMBPA breaks down kingmakers into ten different historical categories, and as you suspect, the politics of VTM are another fertile field for all ten types being potentially possible. The prince is resented for stringent policies of control, they are targeted by the ambitious power-seekers within a territory, and, while respected and empowered with the levers of policy, are forced to take a hand in administration: tedious nightly decision-making and social-networking activities that most powerful vampires would potentially find an unpleasant distraction from other ongoing projects.

The challenge in a puppet prince's leadership is that they still need to inspire unquestioning obedience through the cultivation of an image of strength and heroism and Ventrue-favorite 'dignitas' that might be compromised by revelations that they are not the one truly in control of the overarching aims of the court.

I think that my favorite example works based on true historical events on this subject are the film "A Royal Affair" https://en.wikipedia.org/wiki/A_Royal_Affair, where the lazy, party-happy king of Denmark is battled over by his enlightenment-age personal physician trying to pass progressive anti-religious anti-slavery measures and the king's ultra-religious, ultra-rich privy council of corrupt aristocrats, and Agincourt https://www.amazon.com/Agincourt-Henry-Battle-That-England/dp/0316015040 detailing a brutal French civil war that happens between two wealthy and powerful dukes warring for true supremacy of Paris (even allying for a time with England) while the king on the throne is mentally incapacitated due to a traditional lineage of royal incest. Contrary to this clever maneuvering was the fashion-loving inventor of the modern suit controlling England for a few years because of the way he put on pants https://www.youtube.com/watch?v=C7CRWGPlYfE