I always would've said John Stockton but Steve Nash's court awareness,outside shot,and pure work ethic make my answer easy.
Steve Nash(the man outworks and outsmarts everyone)
Steve Nash(the man outworks and outsmarts everyone)

Just how many games have you seen them play? I'm asking because it's always the same tagline and charicature, without any knowledge of this team. "They don't play defense"? Go ask the Spurs about that one.