Question

that said the first truly accepted take-off and flight powered by nothing other than the pilot himself

Answer 1

Gustave Albin Whitehead (born Gustav Albin Weisskopf; 1 January 1874 – 10 October 1927) was an aviation pioneer who emigrated from Germany to the United States where he designed and built gliders, flying machines, and engines between 1897 and 1915. Controversy surrounds published accounts and Whitehead's own claims that he flew a powered machine successfully several times in 1901 and 1902, predating the first flights by the Wright Brothers in 1903