R J Mitchell
Barnes Wallis
Werner von Braun
Scott Crossfield
Derek Astridge
Konstantin Tsiolkovsky
Arthur C Clarke (yes, the writer - he did rather more than that)
Francis Rogallo (and his wife Gertrude)
Mike Whittaker
Chris Heintz
Barnaby Wainfan
Bill Brooks
Burt Rutan.
Come to think of it, most aeronautical engineers of merit have achieved quite a few things - but these ones are reasonably easy to look up. The last 7 are still alive too and without too much trouble, contactable.
That said, if I wanted to write about one, truly fascinating overachiever (and didn't want to work too hard finding information), I'd pick either Barnes Wallis, or Scott Crossfield.
G