As many have already said, it's hard to answer this without qualification. Obviously Plunkett, Flutie, Testicleverde all wore the Pats uniform, but the good/great argument for them doesn't really consider their time here, with Plunkett being probably the only arguable case since he does have numbers here (mediocre at best).
As for the others.
Babe and Eason - ehhhhhh, serviceable, and possible good. Certainly not great. Although Eason has a special place in my heart by guiding them to the "big show" during his tenure (even if to just get smacked by Da Bears). Still, history dictates that he was okay-good at best.
Grogan - Good for me, not great. I loved him, because it was these years that really drove me to the Pats, so there is a special place for him in my heart too. Sentimentality aside, he's in the good column, does not approach great.
Bledsoe - Looking primarily at his numbers here, I put him in the Very Good to "at times" Great category. He sure threw a purdy pass in his day. Again, I may be overrating him because I tend to remember him guiding us out of the abyss of the early 90's. Football became fun to watch again when he came in. Again, bringing us to the "big show" helps with my memories too
. I also tend to give him a pass for his later years here. I blame the coaching and management more for moving the system outside what he was (a set in stone pocket passer). Had they kept the system to his strength (and brought in players that fit it - O-LINE, WRs), he still had some productivity left in him here. His skills deteriorated after leaving here, but the "better" QB of his early career stands out the most for me as I look back.
Brady............ is the G.O.A.T..... He is a man among boys. There is no disputing that.
