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