R’ Yitzchok Meir ben R’ Yisroel Alter-Rottenberg ZY”A, Chiddushei Harim. Descended from Maharam M’Rutenburg (1866)
R’ Chaim Chaikel ben R’ Shmuel Levin of Amdur ZY”A, talmid muvhak of Reb Ahron Hagadol of Karlin
R’ Rafael ben R’ Aryeh Leib Shapiro ZY”A, son-in-law of Nitziv and Rosh Yeshivas Volozhin (1921)
R’ Yitzchak Yaakov Rabinowitz ben Noson Dovid of Biala ZY”A ,Divrei Bina (1905)
R’ Yehuda Moshe Tyberg-Danziger ZY”A, Alexander Rebbe of Bnei Brak, Emunas Moshe, son-in-law of previous Rebbe
Note: There are yahrzeits I might not include either beacause I didn't have the time or I am not aware of them. If you know that today is the yahrzeit of a Rebbe, Tzadik, Rosh Yeshiva etc. that isn't listed feel free to mention it in the comments.