R' Mordechai Schwab

From matzav.com:

(1911-1994), younger brother of Rav Shimon Schwab. After spending three years at the Mir yeshiva with his older brother, he learned at Kaminetz with Rav Baruch Ber Lebovitz. During World War II, he was one of the many who traveled across Russia to Japan and Shanghai. He spent several looking for work, and then working as a rebbi in yeshivos ketana. When he was over 50 years of age, he took a job as ninth grade rebbi at Beis Shraga in Monsey. About ten years later, this position developed into a full-time mashgiach. After the passing of Rav Yaakov Kaminetzky, Rav Mordechai was approached to assume the position of Rav in Reb Yaakov’s shul. He refused, later confiding in someone that he would be forced to wear a rabbinical frock, which could inspire feeling of gaavah. He is remembered by many as one who always smiled, frequently laughing, especially at himself. But, as his brother Rav Shimon stated, his externals concealed his tzidkus. Above all, he excelled at finding merit in all others he met.