Vallabha, also known as Vallabhacharya or Vallabha Sampradaya was a Telugu philosopher and the founder of the Pushtimarg, a sect of Vaishnavism particularly popular in the Braj region of Uttar Pradesh, India.
Guru Nanak
Born in 1469 in Talwandi (Nanakana Sahib in modern-day Pakistan), Guru Nanak was an Indian mystic, saint, and the founder of Sikhism. He was the first of the ten Sikh gurus who conceptualized a unique spiritual movement based on equality, good virtues, fraternal love, selfless service, and devotion.
Mirabai
Meera or Mirabai was an Indian sage, mystic, poet, and a devotee of Krishna. She is considered to be a prominent figure in the Bhakti movement from the 16th century that took place mainly in the northern parts of India. Meera was born in Kudki (Rajasthan) to a royal Rajput family.
Kabir
Born in the holy city of Varanasi, Kabir or Kabir Das was an iconic Indian mystic, sage, and poet from the 15th century whose work is cherished by followers of both Hinduism and Islam, and also, Sikhism. Though brought up by Muslim parents (a family of weavers), Kabir became a follower of devotional Hinduism leader Ramananda. But he was critical of both Hinduism and Islam and often questioned the relevance or purpose of rituals.
Ramanuja
Ramanuja or Ramanujacharya (1017-1137 CE) was a Hindu theologian and philosopher whose explorations and doctrines greatly influenced the Bhakti Movement in the Indian subcontinent. His core philosophies revolve around devotional Hinduism, particularly towards Lord Vishnu and his consort Goddess Lakshmi. Primarily, his work signifies the importance of Bhakti towards a divine entity (Vishnu in his case) as a tool to attain spiritual liberation (Moksha).