Definitely somebody in 1906 not before.
Chronologically, I don't understand that? IF we are to disregard the Wright's 1903 experience as a
Power Glide (a term I read last night and used by John W.R Taylor to describe Ferdinand Ferber's 1905 flight), then don't we just end up back with the Wright's - and their III model?...
You mentioned Henri Farman earlier...
If you ask me who performed (using a plane) the first practical, self sustained flight in close circuit, then this person is Henri Farman. Before him I do not see any serious evidence that somebody else achieved such a flight.
But that was 1908 and Flyer III was doing the same in 1905? Or are wheels and that gravity fed catapult the issue?