Hi and welcome to pixls. 
The as-imported initial darkroom view of files in darktable is always different to the jpeg, as dt doesn’t apply much processing for you. Having said that, have you tried using the sigmoid workflow? (or just switching off filmic and switching sigmoid on).
That often gives a more familiar starting point.
Would you like to share and licence an example RAW+jpeg pair, one that you’re happy to make public? For licence you just need to specify a CC0 licence, we usually use this one…
Creative Commons, By-Attribution, Share-Alike
I would be fairly confident of being able to give a reasonable consistent match, assuming no unusual issues crop up.
Sorry, I’m not quite sure of the question?