The Collaborative International Dictionary of English v.0.48:
Suggester \Sug*gest"er\, n. One who suggests. --Beau. & Fl. [1913 Webster]WordNet (r) 3.0 (2006):
suggester n 1: someone who advances a suggestion or proposal; "the suggester of this absurd strategy was a fool" [syn: suggester, proposer]