My next step was to take one of the photos where the man was walking to the left edge of the image and try cropping it in different ways.
The image in the top left is an uncomfortable balance between subject and setting as the man is too close to the top of the frame. This feels unnatural and gives him an unrealistic height. The image in the top right wires better as he is close to the bottom of the frame and more of the background is revealed. This feels more natural as this is the background that he is actually experiencing.
The third crop is more centred and whilst the man is prominent in the image, and there is still a sense of movement. The final crop is a more even balance of the subject and background. The river bank can be seen but it is even with the bushes and trees.