Kara-Tromso (1m-1.5m) (DM) I play him first team for Chelsea first season just make sure you PPM him to not take so many long shots and he's perfect.
Zeman-Sparta Prague (800k) (AML) Cheap young winger, very good technically and will serve as great backup/first team.
Henriksen-Rosenborg (2m) (CM) Excellent young playmaker.
Conca-Guangzhou (3.5-4m) (CM/AM) Brilliant, inexpensive playmaker.
Courtois-Genk (1.1m) (GK) Excellent prospect.
Vaclav Kadlec-Sparta (1.5m) (ST/AML) Brilliant Poacher/Inside Forward.
Badelj-Dinamo (2.4m) (CM) Cheap, complete playmaker.
Kermit Erasmus-SuperSport (180k) (ST) Young, extremely impactful prospect who can certainly make an impact from the bench/in League Cup games.
Atila Turan-GF (2m) (LB) Brilliant young LB.
Lacina Traore-Cluj (2.2m) (ST) Big rangy (6''8) striker with good potential.
Mario Fernandes-Gremio (7-9m) (CB) In my opinion essentially the 'next' or at least 'the most similar' young CB to David Luiz.
More names-Kovacic, Barbaric, Mazuch, Khalil, Ganea, Joel Robles, Torje, Rapa, Celustka, Agyei, Shaqiri, Pereyra, Lamela, Guarch, Sanogo, Piatti, Parejo, Breno, Kroos, Gundogan, Vukusic, Casemiro, Appiah...
Not sure what update you're on/what positions you need/what nations you have loaded...Just threw out a few names for you to look up, hope ^ helps you out.