These are champions that lack of some type of fighting potentional, such as peel cc or others, sure they deal a lot of dmg but thats part of their kit, you will never see a tanky tryndamere or fiora and I mean like full tanky, nor will a fizz or a nidalee, their kit is based on damage so that they can one shot the adc or their mid laner. Yet still I agree that these champions are really powerfull , but they can be counteredm pick fiora get rekt with Jax or Jayce, trynda just pick Vladimir you poke him down with q and when he e you, you just go swim on blood, Katarina is the easiest one to counter you just need one cc and nail it when she ults and she is dead supports like Taric Thresh Alistar Annie and Junglers like Rek´sai and lee and Nautilus its just Katarina´s hell, hope I little bit of this type of counters help you when you have to deal against them