6. Antonio Conte

Teams managed this decade - Sienna, Juventus, Italy, Chelsea, Inter Milan
Out of all the brilliant managers in the league, only one has gone unbeaten for an entire season and earned the crown of "Invincible" by winning the league title that year; that man is Antonio Conte. He is also one of only two managers to manage a team in the lower leagues.
Conte started off the decade by leading Sienna to promotion as the club reached Serie A. After that, he left for Juventus, who were the first major team which the Italian was in charge of. In his debut season with the Old Lady, Conte managed to win the Serie A title without a single loss, being the first manager in the history of Italy's top division to accomplish that feat.
Conte continued to impress domestically as he did a 3peat of Serie A titles and won the Panchina d'Oro (Serie A's coach of the season) on all three occasions. His team set records for conceding the least goals and winning the league with a record 102 points. However, due to his disappointing run in the Champions League, Conte left Juventus in 2014.
After a brief stint with the Italian national team, Conte headed to England to manage Chelsea. In his first season with the club, he won the Premier League. He followed that up next season with an FA Cup, but as is the case with the Blues most of the times, the union did not last long. The former Italian international was dismissed in 2018, and he took a year's hiatus before joining Inter Milan, whom he manages right now.
Conte's tactics and his innovative 3-5-2 formation is applauded by many experts of the game. His defensive prowess and his team's direct style of attack are a deadly combination, which saw him gain success in England and Italy. However, the manager's lack of European success hinders his chances of a top 5 finish.