Thanks guys.
The details for the John Tulloch I've mentioned above, are a combination of census records and then more detailed info via a consensus of member trees, all on ancestry.
I am researching the Forfarshire disaster and its aftermath, including trying to put together the biographies of all the victims, and the subsequent life stories of the survivors.
Of those, John Tulloch is important, being the de-facto leader of those stuck on the wreck and on the rock, and then rescued by the Darlings. Tulloch stayed in the area as a representative of the Hull Steam Packet Company for a little while, but then effectively disappears from the record.
One or two of those survivors that you've listed, later wrote memoirs for newspaper articles decades later. There was another group of survivors, too, who fled the ship in a lifeboat just before it struck, and again, some of their stories are (at least part-)known, while others just vanish into history.
The John Tulloch in the census records is about the right age, from about the right place, and is the only John Tulloch who identifies himself in the census records as a ship's carpenter - the role and occupation of the Forfarshire survivor.
This is, of course, nowhere near enough to confirm they are one and the same - hence I was hoping that there might be some family legends or other research to identify the man that was rescued by Grace & William Darling, and who rowed out a second time with William to save the others.
It would be a great story to restore to a family, and a notably resourceful and brave man from history could be given his context and biography.