There are a few more tanks I would have considered. I think the Brits had a few early tanks that struggled, like a few of the Mk types or Matilda.
The British Churchill tank was almost obsolete when introduced in 1943: an ungainly, over-armored, vehicle that was too long, too tall, and too narrow. (It was designed to pass through British railway tunnels) Samples were left behind for the Germans to study after the raid on Dieppe.
But it eventually found a niche as the chassis for a series of armored support vehicles for the Normandy landings among the collection called Hobart’s Funnies. Among them were a bridge-layer, a flame-thrower (The Crocodile), and a mine-clearer.
The tank itself underwent some redesign and emerged in the last year of the war as a welcome infantry support tank that could withstand hits from German 75mm guns and continue to fight.