Settings in novels like the one in RimWorld?

[Amnekian]

I absolutely adore the setting. The sheer amount of planets and colonies alongside the disparsity in communication and distance can lead to very isolated planets. From hightech worlds to near mediavel ones. Golden shinning beacons of civilization to pure dictatorships and anarchy. What I want is "RimWorld" in novel form. Just civilians, no one's a hero and the like. The closest that I can think of is Warhammer40k. The setting also employs humans as the most numerous and the setting employs a faulty FTL travel which leads to isolated planets or a cluster of them. Too bad the novels focus on the epic portion of the setting.