How did Leni Riefenstahl Contribute to the Values and Culture of Nazi Germany?

Leni Riefenstahl was an amazing woman who lived an amazing life. Few would argue that her artistic beginnings paved the way for such a talented performer, actress, film-maker and photographer. However, her career has been tainted somewhat with controversy: consistently and unfairly associated with the evils of Hitler and the Nazi Party.
Leni Riefenstahl was not a Nazi, nor did she deserve such a label and interrogation as a "nazi-sympathiser" in the form of de-nazification after the war. It is an issue that is often discussed in many sources.
"No words of anti-Semitism ever passed my lips, nor did I write any. I was never anti-Semitic and never joined the Nazi Party. So what am I guilty of, tell me that?" - Leni Riefenstahl.
Her job was to make films for Hitler, which she did successfully, but were her films documentaries, Nazi propaganda, or something else?
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