RN7, have you seen Chico's Notes on Soviet Armor [in T2K]? It's quite good.
https://drive.google.com/file/d/0B1i...5BWWlrN2M/view
Also, Austria used the SK-105 light tank/"tank hunter" (mounting a 105mm main gun) during the Cold War. AFAIK, it wasn't replaced until the Bundesheer adopted the Leopard II in the early 2000s.
https://en.wikipedia.org/wiki/SK-105_K%C3%BCrassier