I also started a new game on Rimworld recently. Excellent management / tactics game, full of small subtleties to discover, a safe bet.
And I play a lot at Killing Floor 2, which is rather resource-intensive.
To name other resource-saving games I play: Mount & Blade Warband, Endless Space 2, Divinity 2 Original Sin. The three are good games but, I dont recommend Mount & Blade Warband which is full of bugs, not very ergonomic and whose suite should come out someday ...
Ryzen 5 1500X CPU, GPU GTX 1060, 16GB RAM - 60fps each