Here are my rankings. I'll also toss my hat in the ring for Napoleon, which may depend on Lumine's questions and other player interest.
Special Tier:
(-) French Republic – First Consul Napoleon Bonaparte
First Tier:
(1.) United Kingdom – King George III Hanover
(2.) Hapsburg Monarchy – Emperor Francis II Hapsburg
(3.) French Opportunists - Charles-Maurice de Talleyrand / Joseph Fouché
(4.) Spanish Empire – First Secretary Manuel Godoy
(5.) Kingdom of Norway-Denmark – King Christian VII Oldenburg
(6.) Batavian Republic - Ambassador Rutger Jan Schimmelpenninck