Bechor Shor
12th century

Rabbi Yoseph Bechor Shor (sometimes called Ri M’Orleans) lived in 12th century France, was one of the Tosafot, and was a noted poet. He was a talmid of Rabbeinu Tam. His noted commentary focuses on peshat, though includes some midrash, and he often adds psychological perspective and investigates the motives behind certain actions and characters. He also used facts about science and nature to help his explanations.