If you are descended from Aryan European stock, the form of government used by your Celtic and Germanic ancestors may be what fits your constitution best.
Look to Ancient Greece, before the rise of Democracy, for a clear picture of how Northern European peoples lived until their conquest by the Romans. Specifically, the Iliad and Odyssey depict the clan based monarchies of our people.
The fundamental unit is the family. Not the nuclear family but a large tight knit clan. All of your aunts and uncles and cousins, second cousins etc. lived together and till the land or ply your trade in a village surrounding one large long house which contained a open air hearth sacred to your family.
Each clan had a chief who was elected by virtue of their personal qualities.
If you dishonored the clan, you would be punished with ostracism. Being an outcaste, separated from ones family, was a serious enough punishment that people stayed in line.
If war was necessary, the clans of an area would unite together under a King who organized for your peoples defense, often times utilizing a hilltop fortress to protect the women, children and livestock.
Our people lived this way for thousands upon thousands of years.
It is only when large scale urbanization took place that the people began to disrespect and mock their Kings. When people began to live in close proximity to the King, wherein they began to find his faults, they began to leech away his power and invest it in themselves.
Gradually, the elements of Monarchy representative of the people, began to grow more and more powerful until the King was a King in name only (as many countries today). Eventually, they did away with the King altogether and formed Democracies and Oligarchies.
The center of life moved from the clan to the Democratic Cities such as Athens, which then formed Leagues with other cities for protection.
The tradition of Monarchy only survived in the outlying regions of Greek civilization, such as Macedonia.
The Greeks brought this clan based monarchical lifestyle with them from the Balkan Peninsula, where Celts continued to live that way until subdued by Roman Legions.
I submit, those of European stock should form strong unbreakable extended families (clans) with rigid social expectations and norms of behavior. Natural agrarian based village life with a warrior culture is most suitable to our spirit. A Chieftain is raised among us based on his leadership qualifications such as courage and the protection of his people. He is our beloved relative and we pledge our loyalty and service to him. In times of need we unite behind the King.