I like Wandering World 484 by Nekonuko. The bottom of the windows fall exactly 2/5ths from the bottom, but the real magic in this picture is its impressionist painterly feeling created with an overlay that adds texture as well as making the lighting more complex and richer. The color story is beautiful, too, with the yellows to balance the blues.
I like Untitled by Kiiko. I love the interplay of shadow and light. The Rules of Thirds is used in bounding the dark right edge and the placement of the subject. The green and red are complementary colors. It’s well-composed in framing, color, and lighting.