The greatest fighter of all time usually depends on who you ask.  Jon Jones ,  Georges St-Pierre , and  Anderson Silva are always in the discussion, but the GOAT discussion may soon come to an end.  UFC insider and former multiple-time title challenger  Chael Sonnen  believes light heavyweight champion  Alex Pereira could be on the cusp of ending all debate on the GOAT topic. “Alex Pereira is one win away, as a matter of fact, from ending a discussion known as GOAT. GOAT stands for Greats of All Time …