I agree with cropping out the roof part. I think I would probably try to achieve something like this: colorize the image to bring a more uniform color tone to the whole image; up the contrast a little to bring out the cloud structure and to make the trees more silhouetted; slightly darken the top gradually. I applied the same on the whole image, and now there's virtually no difference between the three...

We do not see things as they are. ǝɹɐ ǝʍ sɐ sƃuıɥʇ ǝǝs ǝʍ