Warrior: Mocking banner is a painfully long CD, heroic leap means you move. You can easily feral charge and thrash while youre at it
Paladins: Avenger's shield is only 3 target if they are nearby, you cna easily triple faerie fire at that point.
Monk: totally op ranged aoe threat, not gonna lie.
DK: Good aoe ranged threat for sure. long cooldown and is detrimental to their survival though.
Honestly, there are very few situations, if any, that i felt like druids lacked a ranged aoe threat move.. you can always do something. Unlike most tanks, we can aoe every GCD so that evens out the odds.