Canon RP with Sigma 150-600 F5-6.3
ISO 400
f/6.3
1/250 (I had the lens resting on a fence)
600mm
I adjusted the exposure slightly, cropped, and increased some of the shadow. I am not sure if the cropping is the best or if I should make other adjustments. I am using Luminar 4 for editing and I am still learning how to edit photos.
I like the second photo best. You could maybe crop in just a little bit tighter on his face and try to square it up a little. If you use lightroom, you might want to try with the transform tool making one adjustment line between his two eyes and one down the vertical line through the center of his face. Might also try bumping up contrast/clarity/texture. Cool pictures, though. Take the suggestions with a grain of salt. I only mentioned them as ideas since no one else responded to your request for suggestions.