There are only 4 HOFers deemed by the Football HOF to be "primary contributors" to the Patriots franchise. I collect their RCs as a side project and I added this one today:
I'm missing the most significant, the 63 Fleer Nick Buoniconti - not only a HOF RC, but a short print too. Here are the rest:
Obviously Brady will eventually be added to the list. Other future possibilities I see are Ty Law and Adam Vinatieri