The first two are straightforward, picturesque landscapes of stunning vistas - nicely done! They could, perhaps, use a bit more space above. Opening up the shadows, just slightly, might add to the depth of each photo.
BTW, my use of the word "straightforward" for the first two is not meant to diminish the time and effort you've put into creating these photographs. They are lovely photos. I am using it, instead, to contrast with the third photo...which is not your bog-standard landscape.
Photo 3 is wonderful in it's composition - there is such a feeling of space and huge potential in that sky. I feel more could be done in post-processing to bring out the three-dimensionality of the clouds. The standard would be to raise the White clipping, increase the Clarity and retune the Highlights which may need reducing once the Whites are increased. Also, consider raising the shadows slightly, to give the mountain top more definition. Add in some "sculpting" of the tones in the sky with good old burning and dodging and you will have a stronger image.