So then you want to know what I consider my best team?
Most of the mons I shiny bred for my Sword playthrough are kinda strong: Electivire, Duraludon, Galar Slowking, Obstagoon. Glaceon and Centiskorch are bit squishier, but still not bad imo. They haven't had any issues on the playthrough at all.... yet anyway (since I never finished it xD)
As for Buff mons with like 5 IV's stuff like that. None of them are on my teams, but I do got some. 5 IV Leafeon, Glaceon, Solrock, Popplio, Rowlet, Ditto come to mind.
As stated they aren't being used by me though so I don't consider them a team.