The reason people such as Canaris are not mentioned as often as German villains like Goebbels, Eichmann or Himmler is because first the post war narrative was to be that there were no good Germans.

The second reason is of course that the Allies had no inside help...Enigma aside, they won the war by themselves.

Remind the Russians who got the German plans for the battle of Kursk from an as-of-yet disclosed source within the German military command.

No, much better for Soviet propaganda to pin the laurels on Georgy Zhukov.

And the third was that any war crimes the Allies committed would pale by comparison. IOW, since there were no good Germans, the Germans deserved what they got.