Guys who had their chance(s) to play here and go out on top but made other considered choices...
Lawyer
Ty Law (got several chances)
Willie
The Twig (whose real name shall never be spoken)
The Vinitrator
Had they stayed, they would have contributed to a remarkable franchise winning streak, probably added another ring or so and gone out with many media and industry connections worth a fine post football carreer. Instead, they all chose to abandon the Patriot Way and go for ephemeral short term personal gains. Willie et. al. made their choices, let them live with the consequences.
That said, I'm not against any of them, excepting the perfidious Twig, coming back for a day to retire with honor as a Patriot.