Richard Horne was selected on the wing for all 3 tests against Australia in 2003 including 1 at the KC despite never playing there before or since for Hull FC. So yes he qualifies but would be in most people's team at half back (some will differ ) .

Tom Briscoe has only played professional RL for FC but is not from the Hull area as is the definition of 'home grown' in the original post. Similarly Dick Gemmell, one of the best 2 British centres I've seen in a black and white shirt - Gary Schofield the other (of course) - made his professional debut for FC in the 60s and went on to represent GB but he was signed from amateur rugby in Lancashire.

Thanks for the comments. I had considered all of those alternatives except Harry Markham who was before my time. Although Keith Tindall was a good club player I do not think he was in the same league as Mick Harrison who I think was capped when he was 17, remarkable for a prop in those days.
Given that we seem to have difficulty producing local top class backs it is a good job we have been able to enjoy the class of players such as Gemmell, Schofield and Steve Evans, even without considering the Overseas imports.

Horne has played Scrum Half for GB too, and hooker for a spell i think

Chris Davidson, scrum half