Just a idea that makes sense!

T-54/55 vs Challenger DS

But you don’t mention Maus, that never made production at all?? Nice shifting the goalposts …

Just pointed out that you listed a lotta vehicles that weren’t WW2 vehicles :)

That question has already be answered. There is no problem to have balanced teams. Let’s Take the Tiger 1:
Operational Tiger Is according to Army reports (May 1, 1943):
134 vehicles, divided on the different battlefields.

How many Stugs have been on active duty in Mai 43: 1090
PzKpfw III:
Status & operational readiness (according to the OKH monthly report, May 1, 1943):
Category Number
Total Panzer III inventory approx. 1,060
of which approximately 650–700 operationally ready
PzKpfw IV:
Army inventory on May 1, 1943:
Category Number
Total Panzer IV inventory approx. 2,100–2,200
of which operational approx. 1,180–1,250

gives a total amount of all major operational Tanks/Panzerjäger of 3054 to 3174

and there we have the differenciation: lets calculate with 3100 to make it not too complicated:
Tiger 1 4.3%
Stug III 35.2%
PzKpfw III 21%
PzKpfw IV 39.5%

Counting for 16 players, not counting the minor vehicles such as Sdkfz or Mörser/Anti air, which would also be tiny percentages!!!
0.5 Tiger
5,63 Stug
3,36 PzKpfw III
6,32 PzKpfw IV

What does that mean, only in every second match would be a Tiger. And lets face it, a Tiger can be penetrated from the enemies at that time. Even a T-34 from 41 can pen a Tiger in the side.

Edith i forgot your mentioning of the Jagdtiger. First of all it was not produced until january 44 and deployed in spring. The total amount of ALL Jagdtigers till the end of the war was not even 100 and until summer 44 there have been 0 to 3 operational (according to different sources). In the second half of 44 till the end there have been some seen battles BUT only in 2 Units:
s.Pz.Jg.Abt. 653
s.Pz.Jg.Abt. 512

If we stay strictly to a historical situation then we don’t need any smaller nations as they had no impact what so ever in the late stages of the war.