100% linear 32bit workflow, full EV range, 20k resolution. USE UNCOMPRESSED 32bit ORIGINAL FILE FOR THE BEST RESULT.
Color-graded 20k JPG panorama:
https://drive.google.com/drive/folders/1JJDyOYnknN950HiVyYFvvGo3Zi8J5xcY
Tutorial on how to set nodes with JPG background panorama:
https://youtu.be/aj0LoQLjgYo

09:50, Summer, sunny, clear sky. Country road through a wheat field. Few farm buildings are visible in the distance. Closest objects are around 400 meters away from the camera giving great background horizon line.

Sun is unclipped, so in Cycles, you don't need any light source, other than this HDRI for realistic shadows.

Methodology:
140 photos of the environment with DSLR on a panoramic head (7 expositions) with 2 EV spacing + 9 photos with 1,66 EV spacing of only the sun with ND4000 (12 stops) filter and 9 photos with 1,66 EV spacing with ND1000 stacked with ND4000 filter (10+12=22 stops).