If you're looking for indie games with jaw-dropping art direction, you have to check out "Hollow Knight" if you haven't already. The hand-drawn art and animation are gorgeous, plus the game's lore is incredibly deep, which always keeps me invested.
Then there's "Gris," which is all about the visual storytelling. The watercolor art style is mesmerizing, and the way it ties into the themes of the game is just beautiful.
I'm also really curious about "Dordogne"; it looks like a blend of watercolor art and storytelling that's focused on nostalgia, which sounds intriguing! Have you played any of these, or is there something specific you're hoping to find in the art styles?