Would Field Marshall Friedrich von Paulus qualify?
This below series I found on YouTube (5-parts on the Suzdal camp and Paulus's post-Stalingrad experiences) seems to indicate he was genuinely remorseful, He also fully adopted the East German line on the war. That being said, he basically had to do these things to survive (and was "interviewed" by his captors) so there is an aspect of "we'll truly never know". He may have pulled a Speer, to pull a phrase.
In his memoirs, he skirts the line of "just following orders" saying that his mentality was as such, but it shouldn't have been. Does this count as remorse? Maybe? I don't have a reason to defend the man but this seems it would qualify.
Perhaps if a formal "Free German Legion" of soviet forces made from German POWs occured, lead by Paulus, he would be considered genuinely remorseful in that TLs post-war environment? That's an interesting alt-hist in itself.