Who is known as “Metaphysical Poet”?

Metaphysical poet, any of the poets in 17th-century England who inclined to the personal and intellectual complexity and concentration that is displayed in the poetry of John Donne, the chief of the Metaphysicals.
Other Metaphysical poets are:
- Henry Vaughan,
- Andrew Marvell,
- John Cleveland,
- Abraham Cowley
- George Herbert and
- Richard Crashaw.

Source: Britannica.com