These are the same vacuum tests that got us the OP state of heavy tanks.
The problem is not wiping full health infantry units but the consistently high damage output. Tigers rack up too many kills in too short of a time period. They also do too many wipes against retreating units, right now they basically always get the wipe on a squad that retreats slightly too late because they just don't miss all that often. They also get a lot of wipes against units with low-medium health. Keep in mind that in late-game most units that face the Tiger are not full health 6 man squads. There is so much artillery, small arms fire and vehicles around. Then there is also the problem of the OKW Tiger's barrage ability that makes it almost impossible to effectively use AT-guns against it.
Yeah Like AT guns work wonders on an IS2 and like IS2/Pershing doesn't never wipes squads at all.
I feel your being too complacent and asking for 300 ish mp units to counter(or even hold back) 600+ mp, 200+ f units. Ohh.. lets just use multiple cheap at guns (that's easy for me to make multiple of) to render my opponents 600+ mp and 200+ f investment useless.