The Creator 3-in-1 sets are basically what you're looking for, they just don't get advertised much. A lot of them are more generified and rebuildable, sometimes even more refined versions of more expensive sets or parts of more expensive sets. Maybe the most obvious are the 3-in-1 dragon and dinosaur sets, which to me feel obviously like more generic reworks of D&D and Jurassic Park builds respectively, and have a lot more in the way of generic tiles and bricks than the licensed sets they're derived from.