Jay Baird's book To Die for Germany: Heroes in the Nazi Pantheon covers a lot of the Nazi's death-cult figures (such as Schlageter and Horst Wessel).

These mythologized, highly-propagandistic "lives" of Nazi "martyrs" served the function of providing idea Nazi role-models.

Similarly, Nazi films such as Hitlerjunge Quex set up ideal-types (in this case, of a Hitler Youth boy who takes on communist boys and is killed).

There was a lot of martyrdom and dying-for-the-cause, in short.

I can't think of any cartoon and/or comic-type figures, though. Such "non-serious" approach wouldn't really fit well with the supposed gravity and earnestness of Third Reich culture.