I can see Hinata being a medical ninja, as her personality is one for harmaney. But i can also see her at the lvl of kabto too.
Combining med jitsu and her families "gentel fist" would be deveastating.
As for naruto i dont think he will ever get up to the same lvl as sakura.
But in chap 338 Cap. Yomato stated that naruto is not the same person anymroe
something clicked/happend during his training.