On My PhD thesis, I developed a multicriteria algorithm that tries to find out a best set of alternatives, and no a best set of best alternatives. I want to try it in a set of soccer players, just like the Moneyball movie.
If you are looking for a Brazilian Dream team, look no futher than the 1970 World Cup Winners. Whilst I am normally a big fan of statistics and data, I do not think any algorithm is going to persuade football fans over the evidence of their own eyes. And a team is more than the sum of its individuals.
I am no statistical expert, but it seems to me that algorithms could quite easily come up with the best players for each position, but I don't see how they could measure or assess the extra contribution from the team as a whole. As for Brazil, in 1970 I am not sure there was any team component over and above the contributions from its vastly talented individuals (no one was surprised at the result), whilst in 1982, I think the whole was less than the sum of its parts, in other words the team underachieved. As for Greece winning the European Championship, was this an example of supreme teamwork? Or simply a chance result?