English - Andre Wisdom, Jack Whatmough or Dan Burn depending on how they've developed. May not be Premiership Class.
Non-English - Jesús Vallejo, Emanuel Mammana, Terence Kongolo or Joël Veltman.
Kongolo & Veltman might be out of your price range by 3rd season but worth checking if they are still at their original clubs (Ajax & Feyenoord respectively).