Individal ethic should be right up your alley, they are excellent at living through Ethics Divergence. Can do fun things like having Deviant for bonus free traits, and Encourage Free Thought always on! They do as they like and have no problems with me. My first colony has long since been fully deviated, I cannot find anyone with the original ethic Individual/Fanatic Militarist set! Sometimes there's Xenophobia, and they faction a bit from it, but it's not much of a big deal.
United Nations of Earth are the most user-friendly and care-free if divergence annoys you, as you can ignore it with almost no effort (just Visitor Centers to curb Xenophobia unhappiness). You should try them
Otherwise, Factions are very cheap in terms of influence costs to suppress, later on, Ministry of Benevolence comes up for Collectivsts. And Will to Power. You can drop some Happiness/Propaganda Edicts and Social Welfare and everyone obeys you in late-game, even in the frontier worlds!
Individual+Xenophile combination, or even on their own, make for very easy governing!
United Nations of Earth are the most user-friendly and care-free if divergence annoys you, as you can ignore it with almost no effort (just Visitor Centers to curb Xenophobia unhappiness). You should try them
Otherwise, Factions are very cheap in terms of influence costs to suppress, later on, Ministry of Benevolence comes up for Collectivsts. And Will to Power. You can drop some Happiness/Propaganda Edicts and Social Welfare and everyone obeys you in late-game, even in the frontier worlds!
Individual+Xenophile combination, or even on their own, make for very easy governing!