I don't understand why so many people appear to vehemently oppose Thompson as a possible JTR.
Compare him to Cross, Hutchinson, Mann and Barnett. Take away the one fact that they were around at the time and there's absolutely nothing left.
I even thought of the similarities with the myth of Matter's Dr Stanley. There you had a doctor, whose son, also a doctor caught a disease from a prostitute, so he searched Whitechapel for that prostitute killing others on the way.
With Thompson you have someone who trained as a doctor. He was ill (addiction) and he searched Whitechapel for a prostitute (possibly killing others). Who knows where these oral histories come from? Then you have stories of insane medical students. Some researchers have made greater 'leaps.' Even Druitt was called a doctor.
I hope that your research is ongoing. Facts emerge all the time so who knows?
Until then, surely Thompson should be considered as, at the very least, one of the most plausible candidates? I'm looking forward to reading the Walsh biography. Who knows, I may spot something.
Except that he has no ties whatsoever to the case.
__________________ "Is all that we see or seem
but a dream within a dream?"
-Edgar Allan Poe
"...the man and the peaked cap he is said to have worn
quite tallies with the descriptions I got of him."
-Frederick G. Abberline