In my book is Kaguya still the strongest in the Narutoverse
Created several Dimensions which contains a starsystem,Mother of Charka and Kekkei Genkai and has the Rinne-Sharingan and Byakugan
Hardcore plotarmor,massiv intelligence nerf and a tons of non-sense was needed just to seal her.On paper,Team Naruto had 0 chance against her,as we saw in the first round.Naruto got washed away,Sasukes KS got destroyed by Kaguya without moving a inch and then both got speedblitzed.Nobody in this Series comes close to her.
Anything what came after Chapter 700 was in terms of lore shit.Glad i dont reed Boruto anymore.Ugly Art,new and stupid Maincast,old Villains get hard disrespect and its in terms of Powerscale a joke.