You want a companion dog but prefer the drive of European dogs?
You want a thicker dog but prefer the look of working lines? The working line dogs tend to have a more wiry look and are smaller on average than even American lines. Trying to understand your logic.
Also it's not because the UDC site isn't up to date for litters that it's out of date for breeders. The breeder list was recently updated as a matter of fact with a few removals and additions.
As far as the midwest goes, there's Julie Stade in Kansas, BJF Dobermans who mixes euro and American lines.
There's Protea Kennel in Nebraska (Helia Driscoll) who does the same thing of mixing Euro and American https://www.protea-kennel.com/doberman-pinschers
There's Benchmark Dobermans (Savannah Langdon) in Ohio who mostly focuses on hardcore working lines, and occasionally breeds to American showlines. BENCHMARK DOBERMANNS - Home
Apexe Dobermans (Ashley Stursa) all European working lines https://apexedobermans.com/
Nordquelle in Minnesota, not sure they have a website but they're on facebook.
Tammy Rush's Talane Dobermans is in KS as well index.html
and has at least two litters planned.
There's Chotofvodka in Ohio - Jackie Spratt. I don't know anything about her program but she's on the UDC directory. https://uniteddobermanclub.com/chotofvodka/
J Bar S Dobermans (Suzan Shipp) is in Missouri I believe this is also a blending of lines Doberman Pinscher Breeder Work or show puppies J Bar S AKC Dobermans in Missouri
Kansa Dobermans, in Kansas blend European and American lines Kansa Quality Dobermans
they are also members on this forum.
Krieghund in Michigan also, but not sure if they've got any litters planned for the near future https://krieghunddobermann.com/
I'm sure there are others whom I'm not thinking of right this instant.