According to the Bhagavata Purana, which is a sattvic purana,asserts that Krishna is 'Bhagavan Himself,' and subordinates to itself all other forms: Vishnu, Narayana, Purusha, Ishvara, Hari, Vasudeva, Janardana, etc. The name Krishna appears as the 57th and 550th name of Lord Vishnu in Vishnu Sahasranama of the Mahabharata, and is also listed in the 24 Keshava Namas of Lord Vishnu which are recited and praised at the beginning of all Vedic pujas.
