Top Ten tanks:

1. T-34/85
2. Panther
3. Panzer IV
4. Tiger
5. KV-1
6. Comet
7. IS-2
8. M26
9. Sherman Firefly
10. T-34/76

The Sherman should not be even close to making anyone's top ten list. Although it was reliable and easy to produce it had many other flaws, such as:
1. Weak Armor
2. Wear Gun (compared to German tanks)
3. Extremely flammable

Furthermore, heavy German tanks such as the King Tiger, which had an excellent gun and good armor protection, were difficult and expensive to produce and were prone to breakdown.