Heres a few young players i've found
GK:
Solimar (could be CPU generated but has better stats then most at 18!)
Marshall
Defenders:
Vanden Borre (Very strong, playes CB, SB and DMF, improves into his late 20's)
Soler (Young spanish SB/SMF, could be CPU generated)
Gambino (Very fast when u first get him, could be CPU generated)
Piccolo (Not to sure where he came from but bought him in 2010/11 season in trade with Figo, very good CB/SB)
Midfielders:
Aisatti (Think i got him from FC Twente, bit slow to begin but becomes all round good SMF/AMF)
Joao Moutinho (becomes a legend with his passing and long shots, plays all over midfield)
Maxwell (May be in his mid 20's but improves till he's 31 and becomes brilliant)
Joaquin (May cost a pretty penny, Crespo and 30000 for me, but well worth it for his speed and skill)
Strikers:
Aguero (Solid from start to finish, strong on speed, strengh and finishing)
Babel (Takes a couple of seasons until he shows his worth but becomes an excellent CF)
Mitea (Very fast, striking needs improving though)