3. Sol Campbell
Nothing like signing your rivals best player.
Sol Campbell signed for Arsenal from North London rivals Tottenham Hotspur  in 2001 and went on to make 135 Premier League appearances for The Gunners.
The centre-back eventually left Wenger’s team in 2006 to join Portsmouth, but he will always be remembered for helping the club win six trophies and completing the shock move from White Hart Lane to Highbury.
