Naruto only soloed kiba thats it kind of difappointing for the star of the manga.
Sasuke has soloed some random fodder,deidara with oros power,fodder cloud ninja not to impressive.
Sakura no comment
Kakashi has soloed zabuza,thats all i can think of for him not too impressive for a main charater.
The point im trying to make is the main charaters never soloed anyone thats realy strong like nagato or itachi