He's a partial list but a shelved member lost all his rackets,can't have interact with the other mobsters,he's a pariah and can be whack without family ok.George Barone was shelved at always 80 years and was broke with the genovese family that ordered his murder so decided to flip.For sure some mobsters was shelved and after turned to their families,but I must search the names.

Bonanno:
Joseph “Joe C” Cammarano Jr
Simone Esposito
Vito “The Baker” Grimaldi
Enzo "The Baker" Stagno
John "Porky" Zancocchio

Gambino:

Alphonse “Ally” Trucchio

Lucchese:

Frank "Big Frank" Lastorino