Choice Scarf Gothitelle actually saw a lot of use in OU with Calm Mind, Trick, and some offensive moves. She simultaneously functioned as a stall enabler, a revenge-killer, and a stall-breaker because she could kill or cripple a large variety of enemies and set up on them at her leisure. Gothitelle is one of the primary reasons why Shadow Tag as a whole is banned from Smogon OU, which is why Gothitelle isn't played anymore.
As for Wobbuffet, Shadow Tag + Tickle paired with a Pursuit user was a thing for a while, but Wobbuffet was effectively banned to Ubers before the Shadow Tag ban below ubers.
Arena Trap is so generally strong that when Smogon was suspect testing Dugtrio, people started using Diglet and Trapinch for similar success. Yes, pre-evolution pokemon that you wouldn't even look at otherwise just because of Arena Trap.
Magnet Pull became such an ubiquitous staple that Skarmories began to—and in some cases still—run shed shell, as do a few other steel types like Ferrothorn or Celesteela.
I don't really have an opinion on Camille or how accurate this comparison is, but I saw an opportunity to toss some pokemon and took it.