Choujin Koukousei-tachi wa Isekai demo Yoyuu de Ikinuku you desu! is about prodigies rebelling against a nation they were transported to
Genjitsushugi Yuusha no Oukoku Saikenki is about a guy who is given control of a kingdom in another world
Isekai Kenkokuki is about a kid building a nation out of orphans
Realist Maou Niyoru Seiiki Naki Isekai Kaikaku is about a demon lord trying to build his territory
These are all pretty good and I highly recommend!