Well, unfortunately for everyone about this comedian, you can’t just " shoot ".
speaking seriously for the main topic:
With a Pz IV h you still need to aim to others tanks due to the bad damaging model.
The m5 CANNOT be penetrated from the tureet unless its from the right side or behind the turett ( due to eating shells with no damage at all). Occasionally you can penetrate the frontal plate. But if you want to be sure, just aim and shoot for the little angled panels. The little ones that “ connects “ the frontal and side armor. You will most likely kill the crew from there.
Weather if you are on his side, always aim for the engine, you get a chance to se his tank on fire.
For the m8 you can’t really go wrong as it can be penned from everywhere unlike the m5 ( for some reason ),
The Sherman is actually a bit harder than the previous ones, but not impossible.
When it’s facing you, try to aim for the left side near the cannon so you take out his gunner. And than, try to hit its frontal plate at the very edges. Just near the port machineguns. That’s where are the ammo stored.
If you faced on the side, you can’t go wrong as the “ box “ shape to the front hull, are where the ammo are stored.
And lastly, the jumbo.
There is not much that you can outside hide and hope that he doesn’t sees you, or must be really blind.
If you face it frontally, aim for the hull machineguns. That’s the only frontal weak spot. And after that, I suggest you to reposition your self. Because he can replace the gunner much faster than your reload speed.
If you managed to flank it, aim at the turett star ( little insignia ) and lower the gun to the tracks. And than shoot there. Because that’s where shells are stored, so you can 1 tap him.
Hope this can help you, cheers.
P.s. don’t forget to angle your tank when facing opponents. Angled armor for the German is always better than flat frontal/side armor to expose, as they can penetrate it with relatively no issues.