The harbour at Banyuls. For these revised views I only used +/- 1 stop and gimp-2.9 from 2017-06-26 - at that time ufraw was still accepted as a plugin for my raw files. Here, I forgot to use the Advanced Tone Mapping plugin.

First, the camera's own jpeg, resized to 900 pixels high.
Camera jpeg
Second, from the raw photo at 0EV.
0EV raw
Third, add +1EV for any shadow detail.
+1EV for shadow detail
Fourth, subtract 1EV for any highlight detail.
-1EV for highlights
At last, use the "Three Exposures" filter.
Three Exposures
Sixth, G'MIC Local contrast enhancement filter.
Local contrast enhancement
Seventh, use the curves tool for a bit more contrast.
Curve for contrast
Finally, sharpen with the GEGL Unsharp Mask.
GEGL Unsharp Mask