Rabbis.
Here are a few examples from the Talmud.
Rabbi Yochanan ben Zakkai, Rabbi Yonatan ben Uziel, Chanina ben
Dosa, Bava ben Buta, Shimon ben Hillel, Rabbi Eliezer, Rabbi
Yehoshua, Rabbi Yossi haKohen, Rabbi Shimon ben Netanel, Rabbi
Elazar ben Arakh, Rabbi Yochanan ben Nuri, Rabbi Akiva, Rabbi
Nechuniah, Rabbi Nachum Gamzu, Rabbi Yossi Glili, Rabbi Honi
Me'agel, Rabbi Abba Shaul, and hundreds of others. Each of these
had large groups of disciples.