The 90s Yugoslav team would have been fantastic but there's actually an argument that the 2010 edition would have been even better, you'd have had a team picked from Handanovic, Vidic, Ivanovic, Kolarov, Corluka, Spahić, Tosic, Stankovic, Modric, Rakitic, Jovetic, Mandzukic, Dzeko and Jovanovic, back before he joined us and was still good - most of them at or near their peaks.
Speaking of underachieving teams, I've always wondered why Scotland always did so badly considering the calibre of player they could choose from in the 60s through to the 80s. It's like they folded as soon as they reached a tournament. Also makes you wonder what a Great Britain team would have been capable of: Best and Johnstone as double wingers, Dalglish and Rush at international level, even Darren Fletcher or Ryan Giggs back at the times when the England team was just missing a holding midfielder or a left-sided midfielder.