I think Phillip Sassoon takes the prize. When he was SoS Air
"Sassoon was Honorary C.O. of 601 (County of London) Squadron. The Squadron was nicknamed ‘The Millionaires’ Squadron' because it was reported to have six millionaire members. In 1932 he was enthusiastic about the new
Percival Gull monoplane and ordered his own model powered by a
Napier Javelin 111 six cylinder engine, with the interior finished in red leather. In this luxurious Gull G-ACGR he competed in the
King’s Cup and the
Folkestone Aero Trophy Race. As Under-secretary of State for Air, Sassoon carried out the first general inspection of British overseas air stations, flying the
Blackburn Iris. Afterwards he wrote
The Third Route, published by
Heinemann in 1929, recounting the story of the development of the air route from England to India."
from Wiki
The Third Route confirms him as a Total Aviation Person. He was minted, mind.