The French Somua S-35 is widely regarded as one of the best tanks in the world in 1940, when the Germans invaded.
It was well armed, well armoured, and with decent mobility. Its only major flaw was common to almost all French tanks of the time in that it had only a two-man turret, meaning that the tank commander also had to act as loader, and was thus overworked. While he was attending to the gun, he wasn't looking at the battlefield for dangers or targets.
The model is 1:100 scale (15mm), FDM printed on my elderly Ender 3, from a design by M. Bergman. I've done some structural tinkering to get it to print more reliably, but I haven't added any extra detail this time around.