Only Indrajit (son of Ravana) is considered as a atimaharathi and He is one and only warrior who possessed the three ultimate weapons of Trimurti, i.e. Brahmanda astra, Narayanastra, and Pashupatastra.
Only Indrajit (son of Ravana) is considered as a Mahamaharathi class human warrior ever. He was one and the only warrior who possessed the three ultimate weapons of Trimurti i.e. Brahmanda astra, Vaishnavastra, and Pashupatastra.