Mourinho came to Chelsea in 2004 and won the league 2005 and 2006.
Wenger in 2005 - building the team
Ferguson won the league 2007, 2008, 2009
Wenger in 2007, 2008, 2009... still building the team
Ancelloti came to Chelsea in 2009 and won the league in 2010.
Wenger in 2010... still...