#1 Mahmoud Dahoud
Young Mahmoud Dahoud is one of those players on this list who hasn't represented Germany at the senior level at all. But his club exploits are the most impressive of all.
His performances for Borussia Monchengladbach earned him a move to Borussia Dortmund last January and the half Syrian represented Germany in this summer's U21 Euros, playing an important role in handing the nation the title. A move to BVB doesn't mean that his development will stagnate, thanks to Peter Bosz, who is the kind of manager that is always willing to work with youngsters.
Although a wee unlikely, but an impressive season for the men in yellow could make sure that many shift their attention to Dahoud, who is certainly a one for the future.