Central midfielders
Marouane Fellaini - RCM

Fellaini is one of the most impactful players when it comes to attacking play in the box. He is very good in the air, and dominates his peers. A good example was in the Juventus vs Man Utd game in Turin.
Very many people overlook the fact that it was Fellaini who made the last-gasp winner happen. He pulled about three Juventus players to his side which allowed the ball to fall behind them, and made defending it hard. One would fancy him to win every ball in a one on one situation.
Sergej Savic (6 ft 4) - RCM

The Lazio man is the future of proper central midfield play. He has good defensive contribution, strong ball distribution, and always looks for ways to make direct forward passes.
He is a blend of a defensive and offensive midfielder. Savic uses his strength and height to assert dominance in the midfield area. No wonder he is a subject of interest from top European clubs.