Isser Zalman Meltzer

He studied with many of the great Eastern European rabbis of his time, including Rabbi Chaim Soloveitchik and the Chofetz Chaim, and became the rabbi and rosh yeshiva of Slutsk. Always a supporter of the return to Zion, he eventually moved to Jerusalem, where he became one of its most important rabbis and the rosh yeshiva of the Etz Chaim yeshiva. He left his mark both through his many students and his important writings which include Evan HaEzel on Shulchan Arukh.