Koeman is a very slow player maybe one of the slowest elite defeders of all time,so,I pick a tireless motor that never stop running all the game and can shut down some of the best wingers and main protagonist of the team to help him in defensive phase and he will focus more on joining attacks,shooting long-shots and making some long passes,so,I pick Berti Vogts.
Left side center backs,you need a fast stopper,ruthless,aggresiveness and great in aerial-duels to face all types of strikers(fast strikers like Ronaldo,Riva and Eto and Target strikers like Drogba,Ibrahimovic,Giroud etc.) and I pick Jaap Stam.
Rijkaard and Krol,I don't need to explain anymore.
Roy Keane will be defensive b2b in this game,he has the ability to cover Koeman when Koeman joins the attacks.Keane and Vogts will be Koeman's bodyguards and in this platform Koeman can shine brightest.Keane,Neeskens and Davids will perform some of the greatest midfield trio ever.All of them are complete midfielders stamina,leadership,workrates,ball-playing skills,offense and defense,they have it all.
Stoichkov and Gullit pace would suitable for Cryuff.Three of them are excellent hard workers.