I have a new match to add to my original list.

Person G: Position 19-46 (31.6 cM). Strangeman Hutchins and Elizabeth Cox. Unique descent: Hutchins/Cox -> John -> Alice -> Mary.

(Person B's unique descent in my original post will be edited to show that they descend from Alice's daughter Susanna, instead of just Alice.)

That's nine-ish people with this Quaker community in their ancestry matching on the same segment, and more than half (at least) with unique descents from Strangeman Hutchins/Elizabeth Cox. Time to hit some of the surname boards and Quaker boards. Maybe it will inspire a few people to test!