#4 Helenio Herrera (Inter Milan)
Rightly referred to as one of the greatest tacticians in the history of the game, Herrera was a man with few equals.
An Argentine (born to Spanish parents) who later became a naturalized French citizen, this genius won virtually everywhere he went. As Atletico Madrid manager, he won two La Liga titles. As head honcho at the Camp Nou, he delivered 2 La Liga and two Copa Del Rey titles for Barcelona.
However, it was his time as Inter Milan manager that sealed his legendary status and became the world's first truly super-manager. Arriving in Milan in 1960, he met a fallen giant that had not won the Serie A title in 6 years. His physically demanding methods, tactical brilliance, and unwavering discipline changed the Nerazzurri's fate.
Herrera invented the catenaccio style that has become synonymous with Italian football. His team was ruthless in the pursuit of victory with brutality and snide behaviour mixed with brilliant footballing skills. He created the Grande Inter (Great Inter) team that was the biggest force in Italian and European football in the 1960s.
He won three Serie A, two Intercontinental and two European Cups (UEFA Champions League titles) within those years. Herrera occupies a pride of place in Inter's history that any coach will find almost impossible to upstage.