In North Africa, the Allies would retreat from any attack made by Tigers and lead them on to a minefield to disable them. Once disabled the Allies would pound the assault with artillery until the enemy armour had been destroyed.
In Northern Europe, a diamond four of Shermans could be used ... if the Tiger engages from the right and destroys the Sherman at the front, then the Sherman at the back about turns and attempts to flank the Tiger, while that on the right turns head long into the Tiger and that on the left continues past the first wreck and attempts to flank the Tiger the other way...this gives the Tiger crew a three pronged attack to deal with...
Or, even better, use artillery and TacAir. Your best anti-Tiger AFVs would be the Sherman VC Firefly and M36 Jackson.