If you are completely opposed to even the smallest amount of post processing, then I would recommend:
Contrast 0
Saturation +1
Sharpness +2
These settings produce nice results, but it is really a matter of personal preference. You can start here, then adjust as needed.
If you don't mind tweaking the jpeg a bit after the shot, then I recommend:
Contrast -3 (captures the most DR in jpeg; low contrast images can be increased in post)
Saturation 0
Sharpness 0 OR -1 (many people prefer to sharpen in post, the results can be better than in-camera sharpening)
The best results come from raw; in which case the Contrast, Saturation and Sharpness settings are not applied. It is relatively easy to configure Lightroom to apply your preferred processing to all imported files. Then it is no more work than JPEGs. You can tweak only the files that need it. And all your images benefit from advanced processing instead of in-camera processing.