That's all very nice but how exactly did Naruto obtain them? They're a combo of all chakra natures right? They just appeared when he got back from Hagoromo. You can't say it's from the Bijuu since he was using all of their chakra before then. What allowed him to obtain them? Was it Ashura's path? Also, if all you needed was all 8 chakra elements then why didn't Sasuke or Nagato have any goudama? The Rinnegan gives the user control over all 8 chakra elements, does it not? Another reason why I'm confused.
Naruto obtained them by using all tailed beasts chakra in RSM.
Yes, they are a combo of all 5 chakra natures and Yin Yang release.
No, Naruto wasn't using all tailed beasts chakra before Hagoromo. He got 1 & 8 Tails as well as the other half of Kurama when Obito gave all that to him just when he met the Sage.
Sasuke and Nagato can use all 5 chakra natures independently and individually but they can't combine them like Naruto and tailed beasts chakra can do. When using all Tailed beasts chakra combined, the resulting mixture is the combination of all chakra natures including Yin Yang release, even though each tailed beast might not independently have the respective chakra natures.