no way naruto would win...he eats 3 or 4 bowls or ramen and hes done. goku would definately beat choji....the real question is would luffy beat goku? now that would be a fierce eating competition hahaha cant pick one...not sure.
probably Luffy out of those 3 ^coz he ate the gomu gomu fruit well.. it is obviously that his stomach is able to stretch up to at least 10x sizes than the other 2