o sorry!
look, really good Wbl and wbr are cuadrado and armero. If you cannot buy them, a good solution on the right flank could be drenthe, which is for free at the start.
To render the tactic more defensive try changing the wing backs mentality in single player instructions. That helps alot. Or you can directly change their role from "attacking" to "support", or even "defense". they will still attack a little bit, but they will consider the defense much more.
Remember it is really important to have two really good DC....i really like astori, kirchoff...keep me posted, please!