Can you find any descendants of the others who stayed in England?
Have you tried British Genealogy? https://www.british-genealogy.com/forum/
They are free, they have a great help and brickwalls forum, you do need to register to use the forum.
How about the local family history centre? I believe it is the Cleveland family history centre or maybe Tees-side, I think you can post a request for information, I know you can for other Family History centres.
There is free access to the National Archives (UK) now, look under Teesside, I think that's correct.
Another option is Genes Reunited, it is a pay subscription, they also have a good help forum, and some excellent researchers.
My only other suggestion is to hire a private researcher, I did that several years while looking for a 4 X grt grandfather, they didn't find him, but did manage to rule out many people who were incorrect.
I did find the correct person years later, but it was a complete fluke