So, to answer my question as to the identity of the sculptor who did the Poe bust at the Hay, I realized the answer was right there under my nose, that you coiuld see a name and a date on one of the photos I took. So, I enlarged it:
A.B. Cianfarani MCMXXVII
Aristide Berto Cianfarani (1895-1960) was an Italian-born sculptor who studied at the Rhode Island School of Design. Mystery solved.