I'm actually quite excited with these lesser known players we're linked with. Klopp's work with such players have been pretty remarkable.
Hummels - on loan from Bayern Munich as a youngster
Subotic - 1 season of regular football in Bundesliga II
Schmelzer - promoted from youth team
Şahin - loaned out to Feyenoord the previous season
Bender - 2 seasons of regular football in Bundesliga II
Grosskreutz - 1 season of regular football in Bundesliga II, rose up from lower league
Barrios - linked to the likes of Nancy, Espanyol, Panathinaikos and Hertha Berlin before move to Dortmund
Lewandowski - 2 seasons of regular football in Poland top flight, rose up from lower league
Kagawa - 3 seasons of regular football in J League 2
Piszczek - bosman signing from relegated (bottom placed) Hertha Berlin