RhB EWIV A1275 at Poschiavo.

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