Took a while trying to decide on my 3rd fav. Decided finally on the Russian T-90MS and T-90A. Though they are weaker, more vulnerable, lighter, slower, less accurate but more powerful gun, and still don't have a longer driving range than the Abrams and Leopards. They are well proven in the field of battle against all other gen 4 and gen 3 tanks in the world, they are only inferior to Leopards and Abrams on the battlefield. Their biggest plus, is their price and ease of manufacture, a T-90MS costs only $4.5 million new ($1.7 million cheaper than an Abrams and $1.2 cheaper than a Leopard). The T-14 Armata is not a proven tank yet, which is why I wouldn't chose it as my 3rd fav.
https://www.youtube.com/watch?v=ag7D5eYj1cY 