I would say that the opposite is true. The Tiger I was a heavily armored sledgehammer of a tank. And for that role it was good enough. And any unreliability and other issues that came with it are something that every tank in the heavy breakthrough role had to face in the period.
The panther on the other hand was an attempt to jump a decade in advance in terms of features and thus ended up being unreliable and generally bad in practice when, as a medium tank of the late war, it really should not have been. In terms of realistic planing and design for the role the T-34-85 is essentially the panther done right.