"In truth I know it is a sin to be a mocker": Comedy, Mockery and the Outsider

 In Act 1, Scene 2 of  The Merchant of Venice Portia complains about her potential suitors to Nerissa.  Although she admits that "In truth I know it is a sin to be a mocker"(1.2.57), that admission doesn't prevent her mocking the foibles of her suitors to great comic effect. Her suitors are all foreign-born outsiders who fail to conform to the proper etiquette and standards of Belmont (and presumably to Shakespeare's audience as well).  One way Shakespeare's comedy operates seems to be to expose and satirize the outsider (not unlike some television sitcoms like The Big Bang Theory that satirizes geeks, another outside group)

What about the other outsiders in this play such as Morocco, Shylock and perhaps even Portia herself?  Are they too held up to ridicule for refusing to conform to conventional norms?  Are they merely stereotypical figures (the Black African, the Jew, the Single Woman) that serve as the butt of the play's jokes?  Or is there something else going on?  Do these characters have a different role in the play?  Do they rise above being a stereotype?