Name one tank from the 1940s that fit that criteria... It's a moot point. The "DNA" of the Panther evolved into postwar designs that evolved further. However there is one point I'd like to make: You mentioned the Panther was "overly complicated"... Tell me, are "real modern tanks" medium-weight, simple and cheap, or are they heavy, gas-guzzling, complicated and expensive? Yeah... The Panther was the M1 Abrams/Leopard II/Challenger/LeClerc of its day and it blasted M4s and T-34s like they were Iraqi T-55s.
That particular Panther served for three months with the 4th Battalion of 6th Coldstream Guards Tank Brigade, North-West Europe in late 1944 and early 1945. The Free French scavenged every Panther they could and operated a force of Panthers until the late 1950s. In 1944 the Panther was not more unreliable than any other tank its size.
I really don't see it.
The good features of the Panther were common in other tanks. The gun was great but, the 17 pounder, us 90MM and russian 100 were all pretty good.
No one copied the suspension? Why is that? (you don't need all the wonky road wheels to make a tank ride well, torsion bars and shocks work pretty well, just look at (the M26, m46, m47 m48 m60 , and m1 not to mention all the modern German, and brit designs.)
Not a single tank after the war used power packs in the back drive train in the front. (The reason being the drive shaft makes the tank taller and more complicated. Every German tank of the war has this flas, the Leopord 1 does not. It is far closer to a M26 or Centerion in design.)
The Engine was nothing special, everyone came up with their own engine designs after the war.
Now if you want to argue that german tactics changed tank design then I will agree, the Cent and M26 are direct results of the Germans doing tanks better, just like the Panther and Tiger are results of the russians doing it better first.
You got me on the french, and I hadnt heard the other unit, do you have a link or a book reference it sounds like an interesting read. The french even have a few of the Panthers they fought with in museums.