Isn't that a multisig?
Discussion
Known entities will have tax or other compliance issues…
Then perhaps known entities shouldn't be trustees?
Yea maybe, but then you are beholden to the other signers, who may disappear for a variety of unrelated reasons, I need to be able to contribute and ghost.
I think in this case, a board of trustees using multisig is the best, where each is well known in the community but also pseudonymous (think Gigi).
In other cases, someone like jack might need a more corporate solution like a legal trust.