Hi bud
I think Nungesser would qualify. He was in it early (1915) I can really only comment on the big aces..i'm sure there were loads of non-star pilots who made it throught 3-4 years of flying.
" "Pilot detached at his own request to an Escadrille in the rear, has never ceased since his arrival to seek any occasion to fly; flying up to four hours, thirty minutes each day in spite of the inclement weather. During the course of his last combat he gave proof of the highest moral qualities by approaching to within 10 meters the enemy machine he was pursuing firing in response up to the last moment. He succeeded in downing his adversary which caught fire and exploded in front of the French trenches." Chevalier de la Legion d'Honneur citation, 4 December 1915 "
Of course Charles was much the worse for the wear (Major wounds...several lol).
I think Fonck also qualifies, having flown as early as 1915, but didn't get a pursuit ride until 1917.
The Canadian aces barely miss out, with Barker, Bishop and Collie all get their tickets in early 1917.
Another German off te top of my head is
Rudolf Berthold who survived flying from 1916 early KEK units(EIIIs) only to be strangled by his own Blue Max after the war.
Willi Coppens surely qualifies flying 2-seaters in 1916 and then scouts the next year.
As for the Brits...damn few...brave and foolhardy i guess..anyone know of even one "big" ace? 20+victories?