There have been some steely German centre backs throughout the generations, and with the right guidance, Timo Baumgartl could be a new name for that list. Stuttgart may put up a fight if you try to sign him, but he's worth it. The 19-year-old may set you back a few million, but in return you're getting a physical defender with an intelligent brain and raw stats to match. He's not the finished article, but with some polish, experience and specialised training, he really could be.