R' Aryeh Leib ben R' Asher Ginzberg, the Shagas Aryeh (1695-1785) One of the greatest minds of his time. The Vilna Gaon said that the Shagas Aryeh was greater than him in nigleh, but not in nistar.
R' Amram Blau, head of Neturei Karta in Yerushalayim (1974) This "Neturei Karta" is not to be confused the one in the news recently. The shita of the real "Neturei Karta" was basically the same as that of the Satmar Rebbe. He fought against the desecration of Shabbos in Eretz Yisroel and was respected by the Chazon Ish and many other gedolim of the time. His brother was R' Moshe Blau of Agudas Yisroel.