La Granja is my easiest suggest, it plays really well at all player counts from 2 to 4. I really like it, great game for me.
First Class is faster but really satisfying. Also scales incredibly well.
Keyflower amazing game at any player count. Be warned though at 2 it is cut throat. Really good game, but with 2 it become 0 sum.
Although heavier, certainly not in the realms of medium but does play really well at 2,3 and 4 is Lisboa
A word of warning though. I’m different in my euro tastes to SUSD mostly. Also from your post in the last played thread, I don’t like Teraforming Mars and was wildly unfussed by GWT while I really like Teotihuacan. That being said, those first 3 are widely well regarded and Lisboa is very popular amongst those who like it so they could well be worth a look for you…