I believe Louis, Dauphin of France, Duke of Burgundy, had the best to offer as King Louis XV.
Even at his young age, he was already surrounded by a close number of statesmen who became known as the "faction de Bourgogne" (Burgundy's faction.)
These included:
- His old tutor Fénelon
- His old governor Paul de Beauvilliers, Duke of Saint-Aignan
- His brother-in-law Charles Honoré d'Albert, Duke of Chevreuse, as well as the renowned memorialist, Louis de Rouvroy, Duke of Saint-Simon.
All of whom were high-ranking aristocrats, who although sought personal gains from him reign could have led to a more democratic France, meaning a revolution was not needed.
As their idea for the governemtn was the monarchy to be less absolute and less centralised, with more powers granted to the individual provinces. They believed that the government should work through councils and intermediary organs between the king and the people.
Although, these intermediary councils, would not be made up of commoners from the bourgeoisie (like the ministers appointed by Louis XIV) they would be aristocrats who perceived themselves as the representatives of the people and would assist the king in governance and the exercise of power.
Many, as I too believe, that if the Duke of Burgundy had succeeded to the throne, he may have applied this concept of monarchy, which over time would have led to a more direct constitution monarch.