I've had many succesful games in the older versions, probably the most succesful is my Rangers team in CM01/02 (the best edition), which was as follows:
-------------------Chiotis (GK)-----------------
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----------West (CB)----Ferdinand (CB)-------
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Simao (RWB)--Vieira (DMC)-Ze Roberto (LWB)
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---------Kerr (CM)-----Ferguson (CM)--------
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------Ronaldinho (AM)----Robben (AM)------
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---------------To Madeira (CF)-----------------
Memory's a bit sketchy so this is a collection of the players I had, I can't quite remember exactly which team I played to win the Champions League (this took me 6 season to do by the way

) but the team was dynamite!
The formation did consist of only 2 centre-halfs but it was very effective. The wing backs push right up and provide the service, and the attacking mids play the through passes and also score hunders of goals.
And then there's the legend that is To Madeira. The best player in the history of Champ, and not even real! A form of cheating but hey, I was young.
Taribo West deserves a metion as the best value for a player ever. Free transfer which turns out to be the best defender in the game.