All credit to the Wrights up to 1903.
As to the question, someone else would've got there. It wasn't as close as Ohan and Whittle, but there is no doubt that the sheer number of people trying would've hit on the answers in due course.
As Steve's just said; "the Wright's biggest advantage was their methodical, scientific approach", and that, not the 'first flight'* which proved the
technology rather than the
aircraft that we should acknowledge.
Baldeagle wrote:
Then the stubbornness and drive that helped them succeed held them back from accepting new ideas, and the influence of their litigious father let them to the legal battles that damaged their reputation.
Everything Baldeagle's said, x2.
But we should also recognise it was, to a great extent, down to the Wrights that took America from their leading the world in 1903 and when they demonstrated their machines in Europe, to a crippled aero industry and dependence on the French for aircraft in the eventual entry into the Great War by 1917.
It's often forgotten that while we know about the Wrights now, at the time they just kept mum for some time, and then got in a lot of other people's way with their ridiculous litigation. (Like Lennon & McCartney, much of the later work sucked.

)
EDIT - Or not - see Baldeagle's correction.* We tend to forget that the first flight on that day resulted in a crash landing, normally a disbarment for being regarded as a 'successful controlled' flight, and that at that period all the Wright's flights used - and required - a weight-catapult assisted take-off, so hardly an unassisted flight. Nitpicky, but real history's a bit more complex than the 'skool textbook' version.Regards,