@OP - While the screen shots that you posted provide helpful information, and the images that they show look fine on my system, we also need to be able to inspect some of the actual files that are giving you problems. Specifically, for at least one of the troublesome images, I would like to be able to inspect exact copies of your RAW file, as well as the JPGs that you produced from it (ie, "too dark" and "acceptable" versions). Also, if, in the same directory as the RAW file, you find an xmp file with the same file name, please post that as well.
Please don't post any of these files as you would normally do (ie, as an ordinary image attachment to a forum post). Instead, zip them all up together and post the zip file, or put it in dropbox so that we retrieve it. The reason for doing it this way is because if you post the image files as normal forum posts, they will be recognized by the forum software as image files and it will attempt to compress them and make unpredictable changes to the color space. In contrast, if zipped, the forum software won't know what's inside the zip file and won't do anything to it.
Finally, a couple of minor points:
a) Adobe has at least two "RAW editors", so when you use this term, you could be referring to either ACR ( "Adobe Camera Raw") or Lightroom. It wasn't until I saw your screen shots that I realized that you were talking about ACR.
b) You mentioned that you tried conversion to a "32 bit" version. Don't bother doing this. 32 bit per channel processing is used only as a kind of intermediate file format when working with either HDR files or 3D rendering programs. It has no relevance to the sort of work you are doing, and, in fact, only muddies the waters.
Cheers,
Tom M
