Kakashi was and still arguably one of the best non uchiha Sharingan users. What's your point if the Byakugan was the original eyes of the Ootsutsuki; the only technique that destroyed Susannoo was Vacuums Palms which was only demonstrated by Kayuga because she was the ultimate being. Lets name the other fodder Ootsutsuki's who got there as*ses handed to them just like Kayuga, oh yeah Momoshiki, Kinshiki, and Toneri all of which who had Byakugan's yet couldn't do anything. Stop with the fake hype. Madara and Sasuke aren't normal, of course not, still put Obito, Itachi, and Shisui all of which who weren't Indra's incarnates would still merk the hell out of the Hyuga clan. Name a Hyuga who could single handly kill the Uchiha's. I'll wait.
You just started something that makes me feels welcome to entertain you. Please delete that line or you will be with me the entire day or two.
For the starter,
-no bad guy in Naruto will achieve any victory considering on how this manga is suppose to end and how protected all MC from any defeat
-More time than not Kaguya, Toneri and fused Momoshiki managed to put Sasuke and Naruto in difficult situation and even they should be no second chance but Good side is too strong with plot armor
1. Kaguya - can do 1001 things to avoid defeat but she chose to fly upward + all nonsense writing by Kishi. Before that she have had enough wrecking Sasuke alone.
2. Toneri - at one point of time Naruto power got absorbed by Toneri, left him with just a little and Kurama having a hard time with Toneri's Golem. But plot needs Naruto to win or entire world will be doom.
[video=youtube;BYQWXz-qKo0]https://www.youtube.com/watch?v=BYQWXz-qKo0[/video]
fast forward to 10:10
3. Fused Momoshiki -Speak for itself. I will not explaining in detail but you can ask for it.
But I dont say what makes them powerful is bcus of their Byakugan.