Persian does the job of "preventing hazards from being set up" no better than every other Pokemon with Taunt. It cannot threaten any of the hazard setters with attacks, and they can simply attack Persian. Said attack will at the very least 2HKO Persian. Stealth Rock / Spikes / whatever can just be sent out a little bit later in the game. If I put Persian on the list, it will probably be in the D tier, and mostly because of the Nasty Plot set. I agree with Raseri's suggestion, and will do it right away.