Cuba with two setters-attackers system won all in the 90s, plus the 2000 Olys and a bronze medal at 2004 Olys.
China with their combos and their false opposite (China doesn't play with an opposite but practically with 3 MBs) won the 2003 WC and 2004 Olys.
Russia with their high ball in position 4 won two silver Olympics medals (2000 and 2004), but especially the 2006 WCH!
Those three teams are still the strongest and the ones that won the most important competitions.