Tellers, ost pak with stun , stugs with stun, okw command panther with mark target and raketens, kingtiger with support (jp4 or rakettens ), ost tiger with (stugs or paks), elefant and jagtiger.
Counters to comet exist. There is big difference between overpeeforming unit and uncounterable unit.
PTRS cons before nerf or windustry or tiger ace were uncounterable. Comet is only overperforming
osttruppenspam e.g. with stuff worth half of what you pay is just as annoying
Why should running around with cheap lone squads like a korean starcraft player be encouraged so much?