http://the.shadock.free.fr/sherman_minutia/manufacturer/t6/T6.html
The Sherman with the Pershing turret is a better choice for br4 then the M36 which is an open top td. Given its rarity it would make a better event or premium tank. The T40 would be a good way to bring a 75mm at br2 without making it overpowered. A TD that can slug it out with br3 tanks without being immune to br2 tanks. the T6 celebrates the evolution of the M4Sherman tank and is Cute as hell.