Adi Shankaracharya (788-820 CE): A philosopher and theologian who consolidated the Advaita Vedanta tradition.
Ramanuja (1017-1137 CE): A Vaishnava saint who developed the Vishishtadvaita philosophy.
Chaitanya Mahaprabhu (1486-1534 CE): A Bengali saint who founded the Gaudiya Vaishnavism movement.
Sri Aurobindo (1872-1950 CE): A philosopher, yogi, and poet who developed the Integral Yoga philosophy.
Ramakrishna Paramahamsa (1836-1886 CE): A Bengali saint who emphasized the unity of all religions.
Swami Vivekananda (1863-1902 CE): A disciple of Ramakrishna and a key figure in the Indian independence movement.
Sai Baba of Shirdi (1835-1918 CE): A saint revered by both Hindus and Muslims for his spiritual teachings.
Other notable mentions
Bhagavan Nityananda (1897-1961 CE): A Siddha Yogi who founded the Shanti Mandir.
Swami Chinmayananda (1916-1993 CE): A Vedanta teacher who founded the Chinmaya Mission.
Sri Sathya Sai Baba (1926-2011 CE): A saint and spiritual leader who founded the Sathya Sai Organization.
Many mutts and saints that have shaped India's spiritual heritage. Each of these institutions and individuals has contributed significantly to the country's rich cultural and philosophical landscape.