Look at Kristoffer Ajer's stats before you look at his age. Yes, that footballer is just 17. Financially he's not a risk and when you've already got stats like that at such a young age, you're guaranteed to go far. He's versatile enough to push forward even though his stats don't particularly suit an advanced role, but dropping him in front of the back is his best position. He's just a solid player all-round, and if you bring him into a mid-range Premier League side, you'll grow in tandem with your very own Mr Consistent.