Chelsea's transfer policy since the Roman Abramovich era began in 2003/04 has been a rollercoaster of blockbuster signings and ambitious gambles. This tier list ranks some of the most impactful arrivals, from the game-changing brilliance of Drogba and Lampard to the more questionable acquisitions that didn't quite hit the mark. Did Petr Cech provide legendary goalkeeping? Was Fernando Torres worth the enormous fee? Explore the highs and lows of Stamford Bridge's transfer history and decide which players etched their names in blue glory and which faded into obscurity.