Rabbi Avraham Danzig (ben Yehiel Michael, אברהם דנציג ;1820–1748) was a Posek ("decisor") and codifier, best known as the author of the works of Jewish law Chayei Adam and Chochmas Adam; he is sometimes referred to as "the Chayei Adam".
Posek (Hebrew for "decider"), a type of Jewish legal scholar
Chanoch Dov Padwa (1908–2000), Orthodox Jewish posek and rabbinic leader
Rabbi Zalman Nechemia Goldberg is a leading posek in Israel and is the son-in-law of Rav Shlomo Zalman (see Hebrew article)
Yehuda Leib Tsirelson (1859, Kozelets, Chernihiv Oblast – 1941, Kishinev, Soviet Union) wat the Chief Rabbi of Bessarabia, a member of the Romanian parliament, and a prominent Jewish leader and posek.
Rabbi Chaim Yisroel Belsky (born circa August 1938) is a prominent rabbi in the United States and a world recognized posek, who has served with the Orthodox Union since 1987.