2. Eliaquim Mangala
The French defender has been one of the most highly-rated players in the Portuguese League since joining Porto from Standard Liege in 2011. He came close to joining Manchester City in January, but City were unwilling to match the £40m buy out clause.
His attributes mirror that of Vidic, a very imposing defender in the air it would be almost a like for like swap for Manchester United if they were to sign Mangala. There is also a potential chance he could play the World Cup in the summer. He may turn out for France after he was capped against Uruguay last year.