Manchester City are currently the most dominant club in the Premier League. The Cityzens have won the English league thrice in the last four years and are on course to add to their tally this season.The club's success hasn't come by accident but through a series of well-thought decisions and steps that have proved to be highly effective. First, they appointed an elite tactician in Pep Guardiola. Then they got some incredible players who have led the team to success over the last few seasons.While some of these amazing superstars are still plying their trade at the Etihad, others have moved on to take up on new challenges elsewhere or retired. On that note, here's a look at five signings who have changed Manchester City's fortunes:#5 Yaya ToureThe Ivorian spent eight successful years at the club.One of the finest midfielders in the Premier League during his time at Manchester City, Yaya Toure was an absolute beast in the centre of the pitch. The Ivorian produced a lot of iconic performances, dominating proceedings in the cenrew and helping in both offence and defence.Squawka@SquawkaYaya Toure's record for Man City in the Premier League:229 games311 tackles won302 take-ons completed281 chances created188 interceptions59 goals32 assistsThe epitome of a box-to-box midfielder2:10 PM · May 4, 201825471132Yaya Toure's record for Man City in the Premier League:229 games311 tackles won302 take-ons completed281 chances created188 interceptions59 goals32 assistsThe epitome of a box-to-box midfielder https://t.co/mBEMh00WiJToure switched to the Etihad after parting ways with Barcelona in the summer of 2010, joining on a transfer worth €30 million. He spent eight years with the Cityzens, recording 79 goals and 39 assists in 316 appearances across competitions.The midfielder enjoyed tremendous success with the Premier League outfit, claiming three league titles, three Carling Cups, one FA Cup and one Community Shield. He ended his association with the club in the summer of 2018, leaving as a free agent.#4 David SilvaDavid Silva was a huge force to be reckoned with during his time at the Etihad.David Silva improved Manchester City's midfield significantly after arriving from Valencia in the summer of 2010. Thanks to his brilliant exploits in the centre of the pitch, the Cityzens dominated opposition teams, especially in the Premier League.Manchester City@ManCity69. GOAL FOR CITY!! Sublime from David Silva!5:27 PM · Jan 19, 20136363269. GOAL FOR CITY!! Sublime from David Silva!Silva formed an incredible midfield partnership with Kevin De Bruyne and Fernandinho at the Etihad under Pep Guardiola, and they were simply a joy to watch.The Spaniard was influential in the club's success during his time in England, playing a key role in winning an impressive 14 honours. He left at the end of the 2019-20 campaign with a record of 77 goals and 140 assists in 436 games.