Question

who is the king of dance

Answer 1

The avatar of Lord SHIVA as NATARAJA  is termed as King of dance

Answer 2

 Lord Shiva is known as the king of dance.Lord Shiva is a supreme deity among all other deities.Shiva is known as the God of Yogis .Lord Shiva is the destroyer of the world.
Due to the cosmic dance , Shiva is known as Nataraja -Lord of Dancers.
Shiva's Nataraja dance represents destruction as well as creation of the Universe.