LGPE<GO<BDSP<SWSH<PL:A<SV
Imo, mostly based on playtime. I definitely play BDSP more than SWSH, but they're disappointing remakes, so SWSH edges it out a bit. Let's GO is at the bottom primarily because we didn't need a second Gen 1 remake when we were only up to Gen 4 in that department. We also got the Gen 1 VC games during Sun/Moon. Maybe if it was around the time of the Gen 6 remakes it would feel less superfluous.
PL:A is the better game in terms of performance and catch mechanics, but the weird battle system, lack of breeding, and lack of a proper battle stadium are a bit of turn offs to me. If there was a proper battle stadium, I'd definitely be more comfortable with the weird battle system as I'd have more reason to learn the intricacies of it.
-----
Celebi Update: Still looking. Eventually.
Creation Trio: Dialga has his Royal Gorgeous Ribbon, Palkia and Giratina still need it. Still need the Shining/Brilliant ribbon for everyone, but I'm at 16 Champion stickers and now only losing the Master Rank by a hair because of the "visual" category. I've got the Elite 4 + Cynthia down to a science, it's just such a slog. Each run takes 15-20 minutes and only nets 113k money and 1 sticker, so doing several back to back is monotonous as fuck. 5 ribbons in total left, then they can go pick up their Champion Ribbons in SWSH and wait for SV. It's going to be interesting trying to slot them in with all my more unorthodox battlemons.
----
Got around to playing with my SV battle box for a while. One loosely constructed "team" (I just grab 6 random mons and wing it) actually surprised me. Muk, Glimmora, Salamence, Tyranitar, Vaporeon, Klefki.
Matches are 4v4, so after a few goes I found the later 4 had the best synergy. Tyranitar (Assault Vest) and Salamence (Boots) have a more defensive spread, but their bulk actually catches people off guard quite frequently. I found leading with these two tends to help put a sizable dent into things, and because of their bulk, often get rid of the more dangerous meta threats that lead. Ttar obviously tries to EQ everything until Mence is down thanks to his immunity, and Mence is often bulky enough to survive a hit, DDance, and get 1 drop or meaty hit in. Ttar usually hangs on for 3 turns, and for some reason a ton of people think Ttars are Choice'd, so pivoting to other attacks often leads to surprise KO's while she's out. I should probably opt for a different item for Mence, since I primarily use him as a lead, making Boots pretty useless.
Once those two have done their jobs, out come Klefki and Vaporeon (Dragon Tera). This combo is insane in terms of how hard they call wall you or just needle you to death.
Klefki has Prankster and is a screen setter, but also runs Recycle (Sitrus) and Flash Cannon
Vaporeon runs Aqua Ring (+Leftovers) Surf, Blizzard, and Acid Armor.
Set screens, get AR and at least 2 stacks of AA. As long as the opponent doesn't have a decent Special attacker anymore, they're in for a long and torturous death.
Klefki is just bulky enough to make Recycling Sitrus Berries a viable health source, and Flash Cannon can drop Sp.Def. Surf also barely does damage to it.
With Vaporeon, after 2/3 Acid Armors + Reflect, barring 3 lucky crits in a row, a Physical attacker just can't fucking do a thing to this little monster. Its natural Sp.Def + Light Screen is also quite notable as well, making it fairly tanky on that side of the spectrum. It's not much for outright damage, but considering how damn near unkillable you can make it fairly quickly, it hardly matters. Blizzard is also good for avoiding the need to hurt Klefki while fishing for a freeze. Dragon Tera is for the sake of covering weaknesses only.
VapKi is a hard counter to TatsuDondozo already, but I may swap Glimmora for Murkrow. I'm not finding much use in entry hazards or Sludge Wave, and Haze/Perish Song would probably be much more useful for getting rid of this particularly irritating threat and Tailwind would probably benefit me more overall. My teams definitely not fast, but a Tailwind against a team without would probably be just enough for an edge.