Wilshere, McEachran hasn't had much of a chance but by january he'll have a chance with mikel at the african cup of nations, Cleverley has so he's doing pretty well since going back to man utd. Wilshere has been the main man for arsenal since last season, which is a great acheivement compared to the bit part roles of mceachran and Cleverley has started but isn't a main man yet, so wilshere.
Alexis sanchez or Thiago alcantara (both play for barca btw)
Sanchez, Thiago hasn't had too much of a chance at barca to prove himself while Sanchez rotates with villa and pedro so he has a chance every game, Thiago will become better though with time, passing and attacking like fab and xavi and dribbling like iniesta and sanchez.