Vyasa
Krishna Dvaipayana (Sanskrit: कृष्णद्वैपायन, romanized: Kṛṣṇadvaipāyana), better known as Vyasa (; Sanskrit: व्यासः, romanized: Vyāsaḥ, lit. 'compiler') or Vedavyasa (वेदव्यासः, Veda-vyāsaḥ, "the one who classified the Vedas"), is a central and revered sage portrayed in most Hindu traditions. He is traditionally regarded as the author of the Mahabharata. He is also regarded by many Hindus as the compiler of a number of significant scriptures. As a partial incarnation, Amsa Avatar (aṃśa-avatāra) of Vishnu, he is also regarded by tradition as the compiler of the mantras of the Vedas into four Vedas, as well as the author of the eighteen Puranas and the Brahma Sutras. He is one of the seven Chiranjeevis.
Divine sage in ancient India
Rishi human who may be fictional