ONLY as a politician Hitler was excellent (and his generals also). He make Germany survived one of the biggest economic crisis the country have ever met.
Adolf Hitler (20 April 1889 – 30 April 1945) was an Austrian-born German politician who was the leader of the Nazi Party (NSDAP), Chancellor of Germany from 1933 to 1945, and Führer ("leader") of Nazi Germany from 1934 to 1945. He was effectively dictator of Nazi Germany, and was at the centre of World War II in Europe and the Holocaust. More: en.wikipedia.org.