The Collaborative International Dictionary of English v.0.48:

Raconteur \Ra`con`teur"\ (r[.a]`k[^o]N`t[~e]r"), n. [F.]
   A relater; a storyteller.
   [1913 Webster]

WordNet (r) 3.0 (2006):

raconteur
    n 1: a person skilled in telling anecdotes [syn: anecdotist,
         raconteur]

Moby Thesaurus II by Grady Ward, 1.0:

25 Moby Thesaurus words for "raconteur":
   anecdotalist, anecdotist, fableist, fabler, fabulist, fictionist,
   mythmaker, mythopoet, narrator, novelettist, novelist, reciter,
   recounter, relator, romancer, romancist, sagaman,
   short-story writer, spinner of yarns, storier, storyteller,
   taleteller, teller of tales, word painter, yarn spinner