Christoph Kramer is arguably the most recognisable figure on the list, perhaps because he's already made a string of appearances for the German national team, including the 2014 World Cup Final where he famously couldn't remember taking part after being knocked out during the game. The 24-year-old has physical and mental attributes that rank among some of the greatest in world football and confirm that he is a tireless worker, the heartbeat of a team. He's technically great where he needs to be, and with a little polish he could soar ever higher. The price will be steep but you're guaranteed a decade of brilliance from the Leverkusen man.