RhB EWIV A1275 at Poschiavo.

First, the camera's own jpeg, resized to 900 pixels high.
Camera jpeg
Second, from the raw photo at 0EV, I think this is a bit dark.
0EV raw, too dark
Use +1EV for the base exposure.
+1EV raw looks better to me
Fourth, add +2EV for shadow detail, so actually +3EV.
32EV for shadow detail
Fifth, subtract 2EV from base for highlight detail, so actually -1EV.
-1EV for highlights
At last, use the "Three Exposures" filter.
Three Exposures
Seventh, G'MIC Local contrast enhancement filter.
Local contrast enhancement
Eighth, Advanced Tone Mapping filter.
Tone mapping
Ninth, use the curves tool for a bit more contrast.
Curve for contrast
Finally, sharpen with the Unsharp Mask.
Unsharp Mask