That's not pushing. Ashe is commentating on how forcing and powerful Borg's topspin shots were, not the fact that he kept lobbing the ball into the middle of the court. In that case, Federer and Nadal are Tennis' ultimate pushers.
Nadal doesn't get a "bad rap". He was called "ONE DIMENSIONAL", but that's far from being a pusher.
Also, anyone who has seen Murray play knows that he isn't a pusher. Murray hits the ball WAY too hard to be a pusher. Monfils is the closest thing to a pusher/moonballer in the ATP tour. He CAN hit the ball hard, but he mostly chooses to lob his shots in. Anyone who has seen Murray play against Nadal can immediately tell, this guy is a badass counterpuncher with shades of a full court game.
As for me, I'm not a pusher, but I do make opponents beat me to win a point. They generally have to hit 2 or 3 winners to win a point. If they can't and drop the ball short, I'm going straight into offense and taking the point away from them or I get the free unforced error.