controversialist

from WordNet (r) 3.0 (2006)

controversialist
    n 1: a person who disputes; who is good at or enjoys controversy
         [syn: {disputant}, {controversialist}, {eristic}]

from The Collaborative International Dictionary of English v.0.48

Controversialist \Con`tro*ver"sial*ist\, n.
   One who carries on a controversy; a disputant.
   [1913 Webster]

         He [Johnson] was both intellectually and morally of the
         stuff of which controversialists are made. --Macaulay.
   [1913 Webster]