Ramban
1194-1270

Rav Moshe Ben Nachman (1194-1270) lived in Spain and in his final days moved to Eretz Yisrael. He was among the greatest of the Spanish Rishonim. His writings deal with all areas of Torah, including his perush on the Torah, his chiddusim on the Gemara, his Teshuvot, his seforim on Halakha topics, and many books on machshava. When my rebbe Rav Aharon Lichtenstein zt”l was asked if he were stranded on a desert island with one sefer, which would it be, he replied, “Ramban al HaTorah.” His perush on the Torah can be found in any standard Mikraot Gedolot Chumash.
https://www.sefaria.org.il/texts/Tanakh/Rishonim%20on%20Tanakh/Ramban