AJax 1966
This Ajax roster won the title by scoring 122 total goals. Johan Cruiijff led the way with 33. Put bluntly: this Ajaz team was on a different level than anyone else in the game at the time. They were successful for a couple of years behind the play of Johan Cruijff before he left for FC Barcelona.
FC Barcelona 2010
Pep Guardiola was a game changer for Barcelona, as we talked about above. Manifesting tons of talented youth, Barcelona was able to line up players like Xavi, Pedro, Busquets, and Iniesta on the biggest of stages. The real guy to watch on this team, however, was Messi. They beat a talented Manchester United squad in such a simple fashion that fans everywhere were shocked. No team like them had ever been assembled before.