What season are you in?
If your in the first season look at Yousef Mokthari or use Joe Mason as a left winger.
They usually use him as a left winger in real life.
when i did my game with southampton, i managed to get some really decent players to come to me on loan, such as bebe, kakuta, barry bannan and even zoltan gera! so maybe u could try them, also try and get a player called leroy george, he was amazing for me in my save, getting atleast 10-12 goals and nearly 20 assists so give him a try.
well try quinton fortune, good CM, kamil contofalsky, very good GK, jay demerit, decent CB, lukas dosek, very good RB, callum davenport, laurent robert? might still do a job for u was pretty bad for me but still ok... all of these should be frees mate so good luck