the Selketalbahn https://de.m.wikipedia.org/wiki/Selketalbahn between Gernrode and Eisfelder Talmühle in the 1970s with the Mallets https://de.m.wikipedia.org/wiki/NWE_Nr._11_bis_22 and the 99 6001 https://de.m.wikipedia.org/wiki/NWE_Nr._21
According to the Wiki page in your suggestion, there are only five train journeys per day per direction. For a Train Sim World route that is way too low. If we could get more creativity in the timetable, more fictional services could be made, but that is not something that I expect.
