Charley's son, Bernard, is as different from Biff as Charley is from Willy. While Biff was a popular high school football star, Bernard was the über-nerd. Nerdy though he was, Bernard was always looking out for Biff, helping him with his homework and showing concern when Biff failed math.
Bernard, who once idolized Biff, ends up with a happy and successful life. Of course, success for Bernard has nothing to do with being handsome or popular. He actually ends up being a lawyer in his adulthood and goes off to argue a case before the Supreme Court. Humble like his father, Bernard doesn't rub his success in Willy's face—he only inquires after Biff with concern.