all of them had long been gone from the village, except oro who left after during the time minato was chosen but either way if they were there they wouldnt have made any difference, none of them had the most powerful jutsu them, like jiraya didnt have sm, tsunade didnt have byakogu, and oro didnt have all his snake/immortality jutsuMinato did summon Gammabunta.
Jiraiya was researching.
Tsunade was off getting drunk somewhere.
no, there would be no difference in naruto's skill, u have to realize he's only 16, oro, jiraya were temporary teachers to naruto and sasuke, eventually they would have to get training from someone with like skills, such as itachi and obito with sasuke and bee with naruto, jiraya could only go as far as to teach naruto rasengan and take him to mt.myoboku thats it...naruto could have probably gotten sage mode faster but the outcome now would still be the same bsmCould you imagine how strong Naruto could have been and how different the manga and anime would have been if Jiraya had raised naruto after his parents died, He would also have been an even bigger perv.
Or she was gamblingMinato did summon Gammabunta.
Jiraiya was researching.
Tsunade was off getting drunk somewhere.