Sure Naruto has Kyuubi but if you take that away from him he's a second-class ninja. He didn't have a family, but for a long time Sasuke didn't have one either. Naruto DOES NOT have natural talent, he doesn't think rationally and thereforehe tries to make up for this he trained twice as hard as everyone else. Once again, the hero complex of many Anime comes into play where their shear determination to become the best or whatever drives the story. Not to hate on Naruto he's one of my favourite characters ever, but he really is nothing without his given advantages: Kyuubi, reading the forbidden scroll of seals when other's have not, and Jiraiya as a teacher. If Itachi or even Sasuke don't use their Sharingans they are still top rate Ninjas.

If you take the kyubi away from naruto he would be nothing more than a second rate ninja mabie thats true but if you take it away you should take it all away right from the beginning.
no kyubi means the 4th (currently believed to be narutos father) diddent die most likely hes mother (whom i assume died because of kyubi or something im not really sure howor what happened to her) diddent die or whatever.
this leads to some things that might actuallly make naruto more powerfull than he currently is
1 he would have had a father who was a kage and the 4th would have probobly trained naruto himself
2 he would probobly also have an elite tutor who is a closet pervert, much like the one konahamaru has
3 he wouldent have been an outcast from the town would have had friends who would have taken the time to help him with his training instead of dooing it all by himself
4 naruto gains all the thousands of juitsus that the village knows but loses the immense power of the kyuibi
5 so in this case naruto might easily be on par with itachi
6 theres nothing special about naruto and therefore this anime would never have come to be and we wouldent be here right now discussing it

be careful what you wish for