Scott Sinclair, Miroslac Stoch, Glen Johnson, Franco di Santo, Michael Mancienne, Lassana Diarra, Carlton Cole, Mikael Forssell, Robert Huth, Steve Sidwell, Jack Cork, Patrick van Aanholt, Jeffrey Bruma, Ben Sahar, Slobodan Rajkovic.
Enough? All of them came to the club as academy graduates/young prospects, an were all there during Mourinho's time. All of them, some more than others, became decent players. How many of them were giving a proper chance to become Chelsea players? Probably about 5. Mikael Forssell scored 17 league goals for a shite Birmingham team, then came back to Chelsea and didn't play a PL game until May. That's the sort of thing these players are dealing with.
There's a good number of other youth players bought under Mourinho, who either turned out shite, or were let go before getting a chance to prove themselves.