1. Klopp - by quite a margin. what he did for Liverpool and previously for Dortmund, is simply amazing. I mean, who else could turn Liverpool into the strongest force in Europe? and unbeatable in league this season too?
2. Guardiola - most successful manager in recent decade, with most entertaining brand of football. When everything clicks, his team plays the best football we've ever seen, and winning everything on sight too. But he is fading bit in recent year, otherwise should have been no.1.
3. Zidane - won 3 CL back to back, in his first 3 years of management. No one will ever come close breaking this record for long long time. Yes he couldn't save Real from big mess half way through the season last season, that's the only period he is not winning, a very short one. But this season he leads Real back to top in Spain again. Impressive.
4. Conte - Seems successful wherever he go, Juventus, Chelsea and now Inter, who suddenly becomes title challenger out of nowhere under him too.
5. Allegri - his football is abit boring but he always makes his team win. No one can deny his record at Juventus.
Sorry Mourinho, you were the 2nd most successful manager in the world over past decade. But what you've done in recent years (3rd year in Real, 3rd year in Chelsea, 3rd year at Man Utd), is complete shambles. No great manager would fall that far in similar fashion as yours.