Garry Cook signings made for Manchester City
2008-09 Season he signed: Jo, Tal Ben-Haim, Vincent Kompany, Shaun Wright-Phillips, Pablo Zabaleta, Glauber Berti, Robinho, Wayne Bridge, Craig Bellamy, Nigel de Jong, Shay Given
2009-10 Season he signed: Gareth Barry, Roque Santa-Cruz, Stuart Taylor, Carlos Tevez, Emmanuel Adebayor, Kolo Toure, Sylvinho, Joleon Lescott, Patrick Vieira, Adam Johnson
2010-11 Season he signed: Jerome Boateng, Yaya Toure, David Silva, James Milner, Aleksander Kolarov, Mario Balotelli, Edin Dzeko
2011-12 Season he signed: Gael Clichy, Samir Nasri, Sergio Aguero, Stefan Savic, Owen Hargreaves, Costel Pantilimon
Winter 2011 and Season 2012-13 Players signed were recruited by Brian Marwood as acting DoF, as Garry Cook left in September 2011
Txiki Begiristain signings made for Manchester City
2013-14 Season he signed: Fernandinho, Jesus Navas, Alvaro Negredo, Stefan Jovetic, Martin Demichelis
2014-15 Season he signed: Eliaquim Mangala, Wilfried Bony, Wily Caballero, Fernando, Bruno Zucculini, Frank Lampard, Bacary Sagna
2015-16 Season he signed: Raheem Sterling, Kevin de Bruyne, Fabian Delph, Nicholas Otamendi, Enes Unal, Patrick Roberts, Anthony Caceres, Reuben Sobrino, Florian LeJuene
2016-17 Season he signed: John Stones, Leroy Sane, Gabriel Jesus, Ilkay Gundogan, Claudio Bravo, Nolito, Marlos Moreno, Oleksandr Zinchenko, Pablo Mari, Aaron Mooy, Yangel Herrera, Geronimo Rulli
2017-18 Season he signed: Aymeric Laporte, Benjamin Mendy, Bernardo Silva, Ederson, Kyle Walker, Danilo, Douglas Luiz, Jack Harrison, Olaweyenju Kayode
2018-19 Season he signed: Riyad Mahrez, Ante Palaversa, Phillippe Sandler, Ko Itakure, Daniel Arzani,
2019-20 Season he signed: Joao Cancelo, Rodri, Angelino, Pedro Porro, Zack Steffen, Scott Carson, Ryotaro Meshino
2020-21 Season he signed: Nathan Ake, Ferran Torres, Reuben Dias, Yan Couto, Pablo Moreno, Nahuel Bustos, Issa Kabore
I would have boldend out the first 3 of this seasons signings, but it is too early to tell yet whether or not they have been good signings or not, the others have had time to establish that question.
Players in Bold are good signings IMO made by the club at the time they made them, or did well for what we signed them for, those in none-bold are bad/irrelevant and poor signings IMO for a wide range of reasons, lack of football skills, injury prone, too much spent, signed and never played much etc
But THAT is a full breakdown of ALL signings we made that cost money to purchase (first team or then loaned out) or were free signings made for the first team only.