I kinda agree the only real playable cards from what I've seen at this point is the Rayquaza GX that I cant spell.
Shrine (archetype of its own)
Acro Bike (was good in its first format, is insane in a slower one)
Energy Recycle System (was good in its original format, still good here)
Tate & Liza (virtually everything)
Stakataka GX (Beast Box, Big Metals)
Hustle Belt (Goomy disruption, Alolan Dugtrio, Donphan from Lost Thunder, Heracross etc)
Last Chance Potion (Donphan from Lost Thunder, Heracross, baby Buzz)
Steven's Resolve (stage 2 decks, Metagross)
Metagross (both with the GX and as its own deck)
Swampert (Mallow, Aqua Patch, Magcargo etc)
Magcargo (Zoroark GX, Buzzwole, Swampert, Ludicolo, Heat Factory, Alolan Sandslash etc)
Electrode GX (Sceptile, Donphan, Baby Buzz, Quagsire waterbox etc)
Banette GX (Zoroark GX, Garbodor, Baby Buzz)
Copycat (in virtually everything)
Sceptile (Shrine, Electrode GX)
Articuno GX (Suicune GX partner, one off in water decks)
Deoxys (attack form only)
Latias Prism
Latios Prism
Sableye
The set is absolutely full of very playable cards