James Harold Wilson , Baron Wilson of Rievaulx , KG , OBE , FRS , PC ( 11 March 1916 â `` 24 May 1995 ) was one of the most prominent British politicians of the 20th century . James Harold Wilson , Baron Wilson of Rievaulx , KG , OBE , FRS , PC ( 11 March 1916 â `` 24 May 1995 ) was a British Labor politician .