Aly Cissokho, i bought him in my arsenal save and averaged 7.35 in first year and has averaged 7.45 so far this, 10 games in.
he is now almost as good as sagna.
oh and i advise you to sell gibbs asap as you will get more money for him the younger he is. and keep santos as he is a good back-up and an attacking option at LB where cissokho is more of a defensive option although the can attack quite well. also santos can play wing if you need and is a good crosser of the ball.