I don't know if I would call Stardew Valley "less well known", as it's sold over 10 million copies. It's incredibly popular, one of the biggest indie game success stories ever.
I would also say Animal Crossing and Stardew Valley (and Harvest Moon, for that matter) and very different types of games (despite surface level similarities), so it's pretty hard to compare them directly like that.
The inequality is legitimate.
It doesn't have to be from a single developer, or even a small dev team, but rather from a team that is in some meaningful sense "independent".
This means, as an interesting example, that Minecraft was at one point about as indie as it is possible to be, and now is about as not-indie as it is possible to be.