+1 for Godbound. You play gods, so there is an assumption that it's high fantasy, but the one shots I've played so far had my players tackle interesting dilemmas and generally come away happy that this is not your typical DnD. The game has actual rules to change the world, rules to handle factions with their problems to solve and assets to use and generally what you have is a great sandbox to generate adventures and see what happens when you meddle in the affairs of men.
I find it super light on the rules, despite being OSR, which is exactly how I like it.