I'd say the problem areas in this team are in central defence and central midfield. Southgate's picked a three man defence to make us more solid so the key issue now is creativity. Due to my age I know more about players since the eighties than anyone who came before that so it probably comes down to a choice of of Gazza, Gerrard, Beckham, Scholes or Hoddle. Personally I'd probably go for Hoddle. His passing and set piece ability would add so much to this current team - just imagine him playing passes through to Kane or setting Sterling free down the wing.
Hoddle is the best England player I've ever seen but I'd actually go for Gazza. This England team isn't very good and Gazza was more self sufficient than Hoddle and could make more of a difference in a poor team.