[Imp]

Okay & last we will say on it, Tiger was designed from the start for the role of taking on armour.
The others were upgraded to do so, it was not in their original design criteria. Made sense due to the fact they had good armour. Not even sure first models even had radios, needed tactically if you are going to take on armour.
This is what happened to most early tanks, they were upgraded to take on armour not designed that way at the outset. German MkIII & MkVI for example.

The Germans were the only ones that envisioned tank battles, I think it dawned on the French just before war started but everybody else was stuck in there ways.
Infantry support & break through just like in WWI which is what the tank was originally conceived to do.