if u think about that, spikes + mixed exeggutor can demolish OU in 2hits.
For the snorlax bait yeah, you are right, but atm, there are so many snorlax baits...
Lastly, I still think slowbro gets a special mention here. Anyway, most stuff he checks like band swamp or flygon, he is required to have max hp, just like this scenario
252+ Atk Choice Band Salamence Dragon Claw vs. 252 HP / 232+ Def Slowbro: 153-180 (38.8 - 45.6%) -- guaranteed 3HKO after 1 layer of Spikes and Leftovers recovery