Wizard A left back and a striker IMO. Aaron Cresswell and Gary Hooper would be perfect.
Why a left back,
We have Wayne Bridge who is arguably the best left back in the division and Kelly as back up.
We have Royston Drenthe who has played a fair amount of his games for Real Madrid, Feyenoord and Everton at left back
We have Gunter and Cummings who have both played there.