Sauti.

Recitation of mahabharata depicted in the above picture.

Ugraśrava was the son of Lomaharshana (also called Romaharshana), a disciple of Vyasa.

His role in Indian tradition is remarkable:

He was a learned storyteller and custodian of sacred history.

He visited many holy places and listened to the recitations of sages.

At the forest of Naimisharanya, he narrated the Mahabharata to the sages assembled under Shaunaka.

Much of what we know today from the Mahabharata comes through this chain:

Vyasa → Vaishampayana → King Janamejaya → Ugraśrava Sauti → Shaunaka and the sages → the world.

In a sense, if King Parikshit created the occasion for the Bhagavata Purana, and King Janamejaya created the occasion for the Mahabharata's recitation, it was Ugraśrava Sauti who preserved and spread these treasures for future generations.

Without such narrators, many of India's greatest spiritual and philosophical works might never have reached us. He represents a noble tradition: not merely creating knowledge, but faithfully preserving and transmitting it for the benefit of humanity.

He also is known for thenarating Shiva puran Padma puran etc.