Who is considered as one of the leading advocate of "imagism" in English Poetry?

Ezra Pound:
- He is one of the exponents of Imagism. He wrote a two-line poem as an example of imagist poetry .
- Here is the poem:
" In a station of the Metro"
The apparition of these faces in the crowd;
Petals on a wet, black bough.

Imagist:
- Imagist, any of a group of American and English poets whose poetic program was formulated about 1912 by Ezra Pound—in conjunction with fellow poets Hilda Doolittle (H.D.), Richard Aldington, and F.S. Flint—and was inspired by the critical views of T.E. Hulme, in revolt against the careless thinking and Romantic optimism he saw prevailing.

Source: An ABC of English Literature- Dr M Mofizar Rahman & Britannica.com