From the front at range? Yes, I used the AEC II for Tigers, Tiger IIs, Panthers, and Jumbos, even the IS-3, of course not ranged apart from side shots. Churchill VII is slow asf and can’t even do that. Russia being the most trolly to verse in a chad wagon.
The Tiger can one shot these vehicles back. Now how does a Churchill VII fair against a ranged PzIV with a slight angle? Of course all vehicles around it make short work of a IV, but not that heavy. And we are talking low pen, low post pen, average reload, very slow chassis. However, using the Heavy Tank 6 as an example (so a worse E but better H), it has the gun and mobility to remain valid in the up tier, the armour yes is limited, but then in GFRB at least the Tiger faces less Panther guns, my main fear when in the Heavy 6 and not paired with Germany. The Tigers though, hilarious to verse as they mainly fail to pen me (in the same tank), then I one shot them as they are either flat on or showing the ammo rack of doom (the unclearable front left stack - please remove it to give the Tiger a bit of love).
And sorry but currently AP is a lot worse than APHE, generally.
So, if you are a Churchill VII at a decent range against open top tanks (so use HE, it DOES work for this gun at least) then yeah, all good. It surprises them to be one shot in those if they don’t see the shell used was HE.
People get killed by the VII because they are probably not in a 1 v 1 (so Church allies) or just don’t know the Churchill (slow, weak gun, SO many weak spots to APHE, not AP though).
And no, I am not seriously expecting the game to revolve around one (Infantry) heavy. But I see that certain players are adamant it should in the case of “their” vehicles (I try to play all, and at least spaded all to 7.0 in all but one nation, Israel). And of course these vehicles all play WITH each other as often as not (minor nations, even major).