Russia has good bones and an excellent coach, but lack quality IGL's like a lot of the european teams. Sweden is similar.
I'd say the top 3 (100% with some bias) are the USA, Canada and Turkey.
First off, Canada. FNS is still the best IGL to touch this game, I'd give him a roster of Tenz (Primary Smokes), JonahP (Flex), Eeiu (Info Initiator) and I like the Mada duelist. Another bias statement, but T2 NA duelists can 100% hang in tier 1 and I feel Mada is towards the top of those T2 NA duelists. Jusy based on mechanics, that is an upgrade in every position for an FNS team outside of s0m - whom I would say Tenz is at worst a single step below our W stripper.
Next is America, based on a very similar reason. Boostio is another genuine top tier IGL in the game, plain and simple. Give him Zekken, Zellsis, s0m/bang (relative peaks, streamer more consitent peak but bang and boostio are like besties) and trent. Another allstar lineup backed by a top IGL.
I'd just like to reiterate that it isn't just skill that would make these teams work, it's the backbone of those teams and how they flow - the intagibles outside of shooting a gun.
With that being said, my vote is Turkey. Maybe Russia could run no igl, maybe brazil could, blah blah blah. Turkey could run with 4 players and they'd still make top 4.
ALFAJER, WO0T, RIENS, CNED thise four horsemen of the apocalypse would throw FNS back into retirement before you could drop the man a Bilibili classic. Fuck the other countries, fuck my NA bias, these turks CLEAR.