José Mourinho. A Portuguese.
He was once an interpreter for Robson, when he coached Barcelona, as well as for van Gaal. His coaching career officially began with the Portuguese domestic powerhouse club, Benfica. But after nine games, he resigned due to a disagreement with the board. Following that, he coached Portugal's underdog, União de Leiria, which he managed to advance to the fifth place in the league within half a season and set the best results in the club's history.
In January 2002, he became the manager of Porto, Portugal's other powerhouse club and helped the team get out of the bad state from the first half of the season to eventually obtaining the third place in the league.
Mourinho completed his first full season in 2003. He led the team to win the triple Primeira Liga, Taça de Portugal, and UEFA Cup titles in one shot and obtained a Treble.