I said 85 or Easy 8. Or Jackson or SU-85. The former two are only more expensive than their dinky counterparts for increased AT performance and slightly more survivability for T-34/85 by the virtue of having 800 hp (both are still sure pens) and the latter two are tank destroyers that aren't as good as half a Panther. Obersoldaten are made to kill infantry too, I suppose you consider them to be fine as well?
Obers have no counter in infantry. Sometimes Paras or Shocks can do it, but its very situational.
Panther can be countered by vehicles.
That's the difference.
E8 should be no match for a Panther, which is fine.
85 is already very good counter against Panthers. I can post you a replays where 2 SU85s are killing Panthers
Same for Jackson. Sometimes you get bad RNG when shells are bouncing, but in the end with good micro, Jackson can do the job against Panther.
Nerfing Panther is not a way out.
You should buff counters.