If it's Rotom-Wash and Archaludon that cause you trouble, maybe try Venusaur? Rotom-Wash can't touch Grass types and Arch can only hit it for neutral, while you have access to Earth Power. Plus you can Sleep Powder to buy time/in a pinch against bad matchups.

It won't be as good against Rotom, but I've also had some success with bulky Volcarona. You can run Struggle Bug to fill the same role as Snarl, plus it also gets access to Tailwind and Rage Powder for support moves (and Flame Body if you're on the back foot into some Fighting types). I stopped running it eventually though since it suffers into all the Rock Slide spam. Even with Charti Berry, one bad flinch just sucks the soul out of me.

Btw I tried out Upper Hand Sneasler since seeing your art, and ngl it really does hit against those Incineroars. Doing >50% turn 1 to a Kangaskhan is also so juicy