OpenRCT 2 is pretty great if you're into theme parks, if not i'd recommend Simcity 4, since you can spend hours building your city and really managing it detailedly.
Helium Rain is a very unknown hidden gem. Get through the first few hours and you have yourself a X game style space game/management tycoon, complete with trade fleets, your own space stations and diplomacy with other factions. The economy is more robust than you'll originally give it credit for
If you like dinos, I would recommend getting Jurassic Park Operation Genesis, but if the graphics is something you care about then go for Jurassic World Evolved or Parkasaur.
If you want city building, I think the best one out there is City Skylines