I think paladin and gunbreaker are really totally fine.

Warrior to me feels kind of slow and i can feel my dps is lacking compared to other tanks when i'm not in the big burst window. Speeding up the infuriates a bit more and making storm's eye less of a thorn in the side is about all they need though to be in line with paladin and gunbreaker imo and onslought needs to not cost rage it seems to be a dps loss even using it to close a gap.

A lot of people disagree with me i think but i feel like dark knight's main annoyance is all the ogc skills that are just like "using it is technically better than not using it" while the majority of their kit is just vanilla damage and nothing else skills that would be a lot more interesting if that stuff was integrated
like carve and spit is probably the best one and it feels crap compared to blasting zone while having twice the cooldown