From anthropomorphism +‎ -ist.

anthropomorphist (plural anthropomorphists)

1. One who anthropomorphizes.
   • 2007 January 22, The New York Times, “New CDs”, in New York Times‎^[1]:

     (Instead of do-re-mi-fa-sol, it’s “Foals in winter coats”; Mr. Mercer is a hard-core anthropomorphist.)

2. (religion) Someone who attributes the human form to God.

• “anthropomorphist”, in Webster’s Revised Unabridged Dictionary, Springfield, Mass.: G. & C. Merriam, 1913, →OCLC.