Who are the best Hulkling counters?

Gainsley_Harriott

Preferably 1 or 2 from each class if possible

Fantomaxop

Black Cat, just place calling card on yourself before sp2 and be sure to get combo 40 and Hulkling will have his abilities banned - while you will do 3k burst on every hit. Works amazingly, and the best part that in this matchup you don't have to worry about intercepts and cruelties since most of dmg will come out of sabotage dmg anyway
Decrease of ability accuracy works great in general, so Crossbones, Falcon and etc will be great too
All neutralize champions, intensive stagger champs (Hood, Symbiote supreme)
All who can decrease duration of most important Hulkling buffs - Mojo, Abs man, probably Kindred
Claire with buff immunity
Persistent heal reversal - Fantastic, Scorp, Anti-Venom, probably Sandman.
Giant burst champs, but only if you can line up his indestructible charges: Spot, Kitty, Shang-chi and etc.
Venompool's Om-nom-nom doesn't count as nullify, so he can bypass his ability to turn buffs into passives (unlike Venom)
Kate Bishop cause her frostbite dmg is crazy
Valkyrie if you hit only block
America Chavez and Mystic Spidey do not directly counter buffs, but benefit a lot from them to the point of cheese sometimes