The Collaborative International Dictionary of English v.0.48:

Classicist \Clas"si*cist\, n.
   One learned in the classics; an advocate for the classics.
   [1913 Webster]

WordNet (r) 3.0 (2006):

classicist
    n 1: an artistic person who adheres to classicism [ant:
         romantic, romanticist]
    2: a student of ancient Greek and Latin [syn: classicist,
       classical scholar]

Moby Thesaurus II by Grady Ward, 1.0:

45 Moby Thesaurus words for "classicist":
   Jonathan Oldbuck, Miniver Cheevy, Pre-Raphaelite, academician,
   antiquarian, antiquary, antique collector, antique dealer,
   antique-car collector, archaeologist, archaist, bookman, clerk,
   colossus of knowledge, dryasdust, genius, giant of learning,
   humanist, laudator temporis acti, learned clerk, learned man,
   literary man, litterateur, lover of learning, man of learning,
   man of letters, mastermind, medievalist, mine of information,
   philologist, philologue, philomath, philosophe, philosopher,
   plain stylist, polyhistor, polymath, pundit, purist, savant,
   scholar, scholastic, schoolman, student, walking encyclopedia