proponent

1. N-COUNT If you are a proponent of a particular idea or course of action, you actively support it. (某觀念或行為的) 支持者[正式]

Halsey was identified as a leading proponent of the values of progressive education. 哈爾西被認(rèn)為是進(jìn)步教育價(jià)值觀的首要支持者。