I noticed that alot of Actors from Guiding Light that was on the air from 1937-2009 have appeared on The Sopranos. Here's an example.

Saundra Santiago (Carmen Santos). She played a Mob Boss on the show, and then brilliantly played Jeannie/Joannie Cusamano and her husband Robert Lupone played Roger Thorpe's Attorney Leo Flynn

Paula Garces (Pilar Santos) Played Carmen's Daughter and then worked at the Construction Site where Meadow's Boyfriend worked at where he was called "Shaggy" after Scooby Doo.

Rob Bogue (Anthony Camilletti aka Mallet). Played a Tennis Instructor who Carmella was attracted to but he didn't give her the time of day.

Caitlin Van Zandt (Ashlee Wolfe) Played a Mafia Bride whose Father could only attend the Wedding only if accompanied by Security Guards.

Here are some people I would have loved to have seen on the show.

Jessica Leccia (Natalia Rivera). She could have played either Jeannie/Joannie's Younger Sister or even AJ's Spanish Teacher that both Tony & AJ have a crush on.

Lawrence St. Victor. (Remy Boudreau) He could have been the Grandson of the woman who was Johnny Soprano's Mistress who had an Interest in a Harlem Nightclub where she worked as a Waitress.

Michael Sabatino. (Ex Vince Russo). He could have played Tony's Brother In Law who never felt comfortable with his Brother In Law.

Any other Suggestions?