Some more individual Pokemon I've been thinking about.
Gliscor
Poison Heal Gliscor is painfully vulnerable to Ice attacks of course, and with everything's offenses up it is unlikely to stall all that successfully, but it's offensive potential is much more horrifying when it can replace Earthquake with -ated Facade. With no boost of any kind to its Attack (No nature boost, no EVs, no Swords Dance), this will remove 81-97% of Aegislash's health in one hit, if Aegislash has max HP EVs, when it is in Shield Forme. If nothing else you can potentially switch Gliscor in on something with no good answers to it, put up a Substitute, and then inflict horrifying damage on the switch-in... of course the most natural switch-in is something immune to Ground, so maybe not. Personal note: actually using it, it's thus far working better than I thought it would. I don't seem to have given its excellent Defense enough credit in such a physically weighted meta. I've actually seen a number of other people using it, in fact.
Greninja
Greninja is not actually any worse as a Pokemon, but it does miss out on all the fun if it wants to use its favorite toy, Protean. As such, while physical Greninja might become a thing to take advantage of -ated Return or similar, it would not be physical Protean Greninja, restricting its value. I am genuinely curious as to whether there's anything particularly interesting that can be done with it. It doesn't even get Uproar... so it basically has to be something physical.
Togekiss
Almost flatly invalidates Sylveon. Only two reasons why it doesn't: one, it's part-Flying typing gives it vulnerability Sylveon lacks (But also resistances and an immunity), and two Soak Lanturn can't mess up Sylveon's Hyper Voice if it is running Pixilate, where Soak will de-Pixilate Togekiss' Hyper Voice. (Sylveon also has slightly higher HP and Special Defense, making it decently more bulky against Special attacks) Otherwise, Togekiss is faster, tougher, and harder hitting since it gets Hyper Voice just like Sylveon. On top of everything it gets Extreme Speed: its Attack is bad, but the ability to shoot past +1 priority moves (Or even +2 priority moves from slower Pokemon) and in general the utility of it being priority, especially with the -ate bonus and STAB beefing up its hitting power, can make all the difference. Also notable for horribly walling most Dragonites and Zygardes on the ladder, though watch out: Dragonite can get Iron Head!
Regirock
One of the big things that holds back Regirock is that's overall best attacking move, Earthquake, is not STAB. Not so in this meta, where it can do fantastic damage with Return/Frustration and its Explosion is suddenly not a stupid pointless useless move. Keep in mind that Regirock is actually tougher than Shuckle if it has an Assault Vest and is hanging out in a Sandstorm (Shuckle still has more Defense, but much less HP), and in particular its sheer physical bulk is a lot more relevant in a meta where physical attacks are overall more powerful and popular. And Rocksplosion is something nothing can be immune to and an extremely limited pool of Pokemon can be doubly resistant to: for a lot of teams the only way to blunt an anticipated Regirock Explosion is going to be switching in something that was nearly dead anyway, and if Regirock anticipates the anticipation and just slaps it around with Rockstration that's a free KO for it. It's still held back by its bad speed, but a daring player might try supporting it with Trick Room or just speed-speccing it and slapping a Choice Scarf on it for surprise KOs on people expecting to outspeed. Against a Skarmory with maxed HP AND maxed Defense including a nature boost, maxed attack (including nature boost) Regirock's Rocksplosion deals 83-98% of its health in damage. That means, especially against an opponent who don't realize this is a possibility, Regirock can finish off a slightly weakened Skarmory, or even be Banded and just flat out OHKO with no potential for them to Roost for Steel resistance. In general I've found Regirock surprisingly viable in Metagamiate.
Also it's way too fun to OHKO something, hey switch in Scizor, Swords Dance, and then I OHKO it with Explosion.
Omastar
Omastar lacks Hyper Voice, Tri Attack, Nature Power, or even Uproar, but it does get Wring Out, which is going to be stronger than Ancient Power (Its only special Rock move in normal play, and it's a Specially oriented Rock/Water Pokemon) on any target with 50% or more of its health, before the -ate bonus. After the -ate bonus the target has to have less than 40~% of its maximum health to actually take more damage from Ancient Power than from Rock Wring Out. As such, Omastar has little reason to not run it unless you're specifically hoping to trigger Ancient Power's stat boosts. Other than that it doesn't really get anything out of this meta, and it's still slow and with a very vulnerable typing, On the other hand, Rock Wring Out hits very hard. Against a full health target it's 121 BP, and then the -ate bonus pushes it past Hyper Beam's strength, and then of course there's STAB and the potential to be super effective. Unfortunately, barring running it in a rain team its Abilities aren't much help. I wish it got Sturdy...
Archeops
Step 1: Replace Head Smash with Return/Frustration.
Step 2: ???
Step 3: Profit!
New Stuff on Lanturn
With a Substitute to block Toxic and Whirlpool to trap unsuspecting opponents, Soak Lanturn is way more obnoxious than I'd originally imagined. And I've been running it with map HP and max Defense, nothing really in offense, because the build isn't that reliant on offense, so I've seen it survive stuff like a Facade off Toxic-ed Gliscor. Holy crap. Still plenty counterable, but also still plenty obnoxious.