1. Rabbi Solomon Adler: Rabbi Solomon Adler was a prominent Jewish leader in Kraków, Poland, during the time that Oskar Schindler lived there. He was known for his efforts to help the Jewish community and advocate for their rights. It is possible that Schindler may have had some level of interaction or familiarity with Rabbi Adler and his work, which could have impacted his own understanding of the importance of fighting against Nazi oppression.
2. Tadeusz Pankiewicz: Tadeusz Pankiewicz was a Polish pharmacist and businessman who worked in Kraków during World War II. He is best known for his involvement in creating and operating the underground pharmacy "Under the Eagle," which provided shelter and assistance to many Jews escaping persecution. Tadeusz Pankiewicz's courageous actions could have served as an inspiration for Oskar Schindler's efforts to protect and support Jewish workers in his enamelware factory.
3. Jan Karski: Jan Karski was a Polish resistance fighter and diplomat who is credited with playing a significant role in bringing international attention to the Holocaust. During the war, Karski undertook dangerous missions to document the conditions and atrocities in Jewish ghettos in Poland. It is possible that Oskar Schindler may have had access to some of Karski's reports or information about his mission, which could have increased his knowledge about the ongoing genocide and motivated him to take action to safeguard Jews under his protection.
These individuals are influential and actively opposed German atrocities against them as a significant Jewish population lived in Krakow (German name is Krakau)