Mahmadou Sahko, DC from PSG is topclass, but would eat up your entire funds. Alvaro Dominguez from Athletico Madrid is well-rounded, Ryan Shawcross is also well-rounded while being 6'5 (he's also trained at Man U).. Equeziel Munzo from Palermo has good athletic stats, is young and trainable. Mapou Yanga Mibwa is well-rounded and also versitile (he can play all 3 defensive positions). Breno has good athletic stats as well. Bendickt Howedes is another young good german defender as well. Dejan Lovran is a fairly technical defender with solid athletic stats as well. The key with all of these players (aside from Bendickt), is that they have fairly decent agility and acceleration stats, are 22 and younger (aside from Shawcross) and trainable.