LW: Anthony Martial (£53+ million from AS Monaco)
When United signed a little-known French teenager from Monaco on deadline day in 2015, van Gaal was accused of making a panic buy. £53 million, plus a remaining £10 million should he be short-listed for the Ballon d'Or might seem a reasonable price for a teenage sensation right now, but let's not forget that this was in the pre-Neymar-to-PSG era.
However, his performances over the last two and a half seasons have been impressive. His first goal at Stretford End against Liverpool alone was enough to earn him a place in United folklore, but over the years, he's grown as a player to truly establish himself as a fan favourite.
It's easy to see how much the club means to him as well. In spite of being French and still struggling to learn the new language, Martial's passion for the team is apparent everytime he celebrates a goal.
To top it all off, he's still only 22 and yet to hit his peak. When he does, the very idea of seeing him alongside Pogba, Rashford and Lukaku is terrifying.