15. Carlos Tevez (West Ham to Manchester United, loan, 2007)
The only player to be on this list twice and be part of a loan move. All United had to do was pay his (rather substantial) wages and watch him win the Premier and Champions League, and form a deadly partnership with Rooney and Ronaldo.
14. Ashley Cole (Arsenal to Chelsea, £5m plus William Gallas, 2006)
Hated everywhere outside of Stamford Bridge, but is the best left-back in the world. He cemented this reputation at Chelsea winning everything several times, except the Champions League.
13. Nicolas Anelka (Paris St-Germain to Arsenal, £500,000, 1996)
The moody adolescent arrived and outpaced all-comers on the route to goal for a couple of seasons before sulking his way to Real Madrid for a £22.5m profit. Never reached the same levels again.
12. Patrick Vieira (AC Milan to Arsenal, £3.5m, 1996)
The complete midfielder. Never-ending energy, fierce in the tackle, great feet, vision, speed and cool finisher. Was also a great leader and an inspiration. Did not get on too well with Roy Keane though.
11. Marc Overmars (Ajax to Arsenal, £7m, 1997)
He bought Overmars for £7m, squeezed his best years out of him, sold him to Barcelona for £25m and watched him fade slowly from view.