3) Son Heung-min (Bayer Leverkusen to Tottenham – £22m)
Not much was known about the South Korean before he arrived in this country from Leverkusen in 2015, but over the past six years, he has turned into one of the best inside forwards in the top flight.
After taking a year to settle in England, Son has gone on to hit double figures for league goals in five consecutive seasons, with his most (17) only coming last campaign.