It's a bit subjective to say which St. Louis Blues draft class was the "best." Do you go with the class that produced one of the no-doubt best players, but little else? Or the one with numerous players getting significant NHL games, even though they lack the star power or scoring? The draft class with the most total points? And that's before considering different NHL eras and how the game's evolved over the years.
For the purposes of this, we're going to go with a class that produced players with staying power who remained effective for much of their careers.