I'd rather do a top 11 list of both age groups, not rated in particular order.
DENMARK
20-23 Years of age
Nicklas Bendtner (Arsenal FC)
Mathias "Zanka" Jørgensen (FC Copenhagen)
Simon Kjær (Wolfsburg)
Daniel Wass (Brøndby IF
Thomas Enevoldsen (FC Groningen)
Andreas Bjelland (FC Nordsjælland)
Michael Lumb (FC Zenit Saint Petersburg/Aab)
Nicki Bille (Villarreal)
Mike Jensen (Brøndby IF)
Jens Stryger Larsen (Brøndby IF)
Nikola Saric (Liverpool FC)
Under 20 years of age
Christian Eriksen (Ajax Amsterdam)
Erik Sviatchenko (FC Midtjylland)
Frederik Sørensen (Juventus FC)
Jannik Vestergaard (TSG Hoffenheim)
Nicolai Jørgensen (Bayer Leverkusen)
Nicolai Boilesen (Ajax Amsterdam)
Bashkim Kadrii (OB)
Rasmus Falk (OB)
Thomas Delaney (FC Copenhagen)
Kenneth Zohore (FC Copenhagen)
Victor Fischer (FC Midtjylland)
David Boysen (Lyngby BK)
Kevin Mensah (Viborg FF)
OVERALL TOP 5
1. Christian Eriksen (Ajax Amsterdam)
2. Nicklas Bendtner (Arsenal FC)
3. Simon Kjær (Wolfsburg)
4. Mathias "Zanka" Jørgensen (FC Copenhagen)
5. Kenneth Zohore (FC Copenhagen)
I'm not really sure about this top 5. I don't feel that Bendtner deserves to be rated as #2. Neither does any other come to mind.
I might edit this in the near future 