IS-3
Another age old tank that will likely see play until the end of time. Combine a strong turret, decent frontal and side hull armor, and excellent mobility for a heavy tank into a solid all-round package capable of surviving any meta game.
Compliment this with the traditional huge alpha 122mm in the form of the deadly BL-9, which also has high penetration and surprisingly good gun handling soft stats, and you’ve got the renowned Tier 8 Soviet heavy tank, the IS-3.