StuG III Ausf. G
One of the best TDs in the entire game.
Final gun is powerful enough to penetrate and severely damage all the tanks it may go against in a normal battle.
Extremely good turn rate. Stug can rarely be pinned by medium tanks or even lights.
Very good gun elevation/depression (unlike the SU-100Y, which has beyond terrible depression)
Fairly fast with top engine/suspension.
Very wide gun angle, which is good.
If the Stug takes the first shot, it can take a JgPzIV 1vs1.
Top plate of the sloped armor has an excellent angle, so hiding in artillery craters (like the ones at Himmelsdorf) is a good idea. Take care though, lower front plate is very vulnerable.
Stug III is a very real tank, mass produced, with a lot of history, unlike those bull**it french tanks, which are JUST prototypes and most have never even seen production. During WWII Stug has been a huge pain in the *ss for the Allies.
Advice: Stugs will very frequently fight KV-1S, which can take them with ONE shot (since his turret and gun are those of an IS-1), so beware!