Raoul Wallenberg
Adolf Eichmann, a Nazi official who directed the sending of Jews to concentration camps, ordered Wallenberg to stop interfering with German plans for the Jews.  Wallenberg said no.  Eichmann tried to have Wallenberg killed, but he was not killed.  In the final days before the liberation of Budapest by Soviet soldiers, Wallenberg persuaded the Nazis to stop a plan to kill 70,000 Jews who were forced to live in a ghetto (separated part) of the city.