front man
     n : a person used as a cover for some questionable activity
         syn: front, figurehead, nominal head, straw man,
          strawman
see also:
front figurehead nominal head straw man strawman 

71 moby thesaurus words for "front man":
   charlie mccarthy, agent, anteriority, bold front, brave face,
   brave front, connection, creature, deputy, display, dummy, facade,
   face, facet, facia, figurehead, fore, forefront, foreground,
   forehand, foreland, forepart, forequarter, foreside, foreword,
   front, front elevation, front matter, front page, front view,
   frontage, frontal, frontier, frontispiece, go-between, head,
   heading, interagent, interceder, intercessor, intermediary,
   intermediate, intermediate agent, intermediator, intermedium,
   internuncio, intervener, interventionist, interventor, lap,
   lay figure, mediator, medium, middleman, mouthpiece, negotiant,
   negotiator, negotiatress, negotiatrix, nominal head, obverse,
   ombudsman, preface, prefix, priority, proscenium, puppet,
   spokesman, spokeswoman, stooge, window dressing