They are all so good! However, you can maybe add the sun in front of the person in the second GFX. It would look cool what you can do with sun rays. Also, the water looks a little bit awkward. You should switch it with a higher quality of water in the second image.
(Something like this would look nice with maybe more transparent sun rays.) The way the sun rays over lap onto the objects in front makes the whole scene look really good.
Other than that, all of your GFXs look very well made! 