Surely you would look at the statistics of all the major leagues, see what teams are converting the highest proportion of their corners/set pieces and then scout them. See what could work with our personnel and give it a go. The greatest header of a ball in the modern premier league era is arguably Tim Cahill, now here's a guy whos a midgeet, who uses anticipation and intelligence to attack the ball at the right moment, using his team mates to draw away defenders. It can't be as hard as we make it look, to even be threatening from set pieces.
So can't he be bothered to do something like that?