From that list it would be Thiago Alcantara. The kid is something special. I watched him this summer and in the games he has played this pre-season and early season for Barca. He was a monster in the U-21s against the Swiss. His range of passing and ability to beat players on his own makes him more complete than any of those other guys.
From the players that I have seen often on that list, I would rank it as Thiago, Hazard, Wilshere, Goetze. The rest still feel very much like projects, particularly the exciting kids Canaels and Eriksen. Won't comment on Shaqiri.