So you have 17 I said 12, not too far off. I'd also argue that without an exceptional team around him, I doubt that Wilson, Kaepernick, Newton, Dalton, and maybe even Flacco could win a SB on their own talents.
I'd then lump your elite and borderline elite, plus Big Ben, Romo, Stafford, Rivers, Ryan, and Eli minus the last two seasons into my "franchise" group. Even though some like a Romo or Rivers, haven't won a SB, I do feel they are capable of it with even decent talent Though Romo will find a way to self destruct every year.