Garbodor is obviously really good but you don't have to prepare for it much outside of running Xatu / Defogger / Spinner which most teams have anyways; I don't think it's nearly influential enough for S even though it's a top mon
Imo, these options are not the most foolproof (Xatu hates getting Gunk Shot poisoned on the switch), and the amount of hazard removers that don't get screwed by Garbodor in some way, aka Skuntank and Claydol, the latter of which is still Ghost bait, are limited; Garbodor can work around the Water-type Defoggers with TBolt or Explosion if it really wants to, or just fall back on good ol' Gunk Shot poison. Also lol Hitmonchan. At least Garbo got more support this time around.
Also, have we actually come to a consensus on these?
Tangela C+ -> C
Grumpig B -> B-
Mismagius A- -> B+
Barbaracle A -> A-
Where's the 'needs more discussion' nominations that usually follows up after the actual ones this time around?
C+ to C
As far as I can tell, Tangela's niche is being a bulky Grass-type which can pack a strong offensive punch with invested Leaf Storm to put pressure on foes while packing powder moves to disrupt stuff. The problems arise when you consider that Tangela doesn't manage to wall that much more compared to what the current bulky Grasses (namely Plume, Gourgeist-XL, Ferroseed, arguably Torterra?) can, and I'm skeptical on its value as a 'slow tanky Grass-type' when you consider the sheer number of Grass resists in the tier, many of which are offensive powerhouses, which Tangela can only retaliate against with 60 BP coverage :/. You also gain vulnerability to chip damage and Knock Off for your troubles, the latter of which further limit the amount of mons you potentially wall (like Shiftry and Hariyama). Defensive Tangela sets are even more worthless, as they trade away the hard-hitting power for meaningless extra bulk while compounding the problems of offensive Tangela in terms of offensive presence and competition with other bulky Grasses.
Unsure
All I can really say about Grumpig is that its decent stats (great SpD, workable SpA and Speed), great resists with Thick Fat, and wide usable movepool (Psychic / Psyshock, Focus Blast, Signal Beam, Thunder Wave, Heal Bell, Taunt, Whirlwind) allow Grumpig to put in some / good work in most matches where Skuntank isn't present, but usually turns into a flat out liability if it is. I feel like B Rank already somewhat represents Grumpig's rather lopsided effectiveness, but otherwise I don't have a strong opinion on where it should be ranked.
Leaning on staying in C+
I can get behind why this is being nommed for a rise, but personally I don't feel Raichu is consistent enough to warrant it. Nasty Plot is Raichu's better niche, since it can afford TBolt, Grass Knot, and HP Ice without much concern for coverage (+2 LO Grass Knot already does 90% min. to Steelix). Unless you want to try Magnet, in which case you'll need Focus Blast against Steelix and simply resign yourself against bulky Grasses. The problem comes when trying to actually set up, as Raichu takes like 50% from nearly everything and doesn't threaten too much with its raw power, often putting itself at huge risk (ex: threatening Grass Knot against a Rhydon). Even after that, Raichu still has to watch out for priority moves. Meanwhile, the AoA set's 4MSS becomes more apparent when trying to fit Volt Switch, Thunderbolt, Focus Blast, Grass Knot, and HP Ice. The advantage in Speed is nice, but only really matters against Pyroar at ~66% unless you want to chance the Focus Blast; Liepard may pack the Sucker Punch which does an asston, and it seems less appealing to sacrifice Manectric's more effective 4-move coverage just to have only a 50% shot at best of beating Archeops and Tauros.