A short time ago, I was notified by a friend that Bleacherreport wrote an article of the same subject as this one, but I've put to much work into this to waste it. I will put a link to the story at the end of this article.
Russia: Fedor Emelianenko
No big surprise here. Fedor was considered the best heavyweight in the world before entering into the three fight skid he is in now and went undefeated for a decade, beating fighters like Mark Coleman, Tim Sylvia, Mirko Crocop, and Antonio Rodrigo Nogueira. Other notable Russian fighters include Oleg Taktarov and Alexander Shlemenko.
Canada: Georges St. Pierre
Again, no big surprise. GSP is the current welterweight champion of the UFC and one of the top two pound for pound fighters in the world. He holds wins over Matt Hughes, BJ Penn, and Jake Shields. Other notable Canadian fighters include Mark Hominick, Patrick Cote, and Carlos Newton.
"The Gracie Killer" owns wins over four different members of the Gracie family, and was one of the best ground fighters in Pride, although he has recently fallen into a four fight losing streak. He holds notable wins over Ken Shamrock, Rampage Jackson, and Vitor Belfort. Other noteworthy fighters from Japan include previously mentioned Yushin Okami, Megumi Fuji, Hatsu Hioki, and Shinya Aoki.
The United Kingdom: Michael Bisping
Bisping is a top ten UFC middleweight and noted for his exciting kickboxing based style (as well as the occasional angry episode). He holds wins over Chris Leben, Yoshihiro Akiyama, and Denis Kang. Other British fighters worth mentioning include Paul Daley, Dan Hardy, and Brad Pickett.
Brazil: Anderson Silva
Brazil has produces many great mixed martial artists, but Anderson Silva is without a doubt the best fighter in the world, not just from Brazil, and has the record for the most consecutive title defences in the Ufc. Brazil has also produced the Gracie family, which has widely been credited with much of today's modern jiu-jitsu. Other notable fighters from Brazil include Jose Aldo, Cris Cyborg, Junior Dos Santos, and Royce Gracie.
Germany: Dennis Siver
Siver is one of the few high profile German fighters in MMA, and is known for his infamous spinning back kick. He has some of the strongest kickboxing in MMA and holds notable wins over George Sotiropoulos and Matt Wiman.
The Philippines: Mark Munoz
Munoz is a Middleweight Ufc contender and Anderson Silva'swrestling coach. His style utilizes great wrestling and relentless ground and pound, as well as good striking and take down defence. He holds notable wins over Chris Leben, Kendall Grove, and Demian Maia. Boxer Manny Pacquiao is also from the Philippines.
Australia: Hector Lombard
This one was really close between Ebersole and Lombard, but Lombard gets the nod because of a 2008 bout between the two where Lombard came out victorious. Lombard is the longtime Bellator middleweight champion and Olympic-Judo gold medalist. Other notable Australian fighters include the previously mentioned Brian Ebersole, Kyle Noke, and George Sotiropoulos.
Couture was one of only two men to capture Ufc titles in two different weight classes, and only recently retired at the age of forty-seven. "The Natural" was the master of game planning and spent years in the heavyweight division, where he regularly fought (and beat) guys who outweighed him by 30-60 pounds. He holds notable wins over Tim Sylvia, Chuck Liddell, and Tito Ortiz. Other notable American fighters include Matt Hughes, BJ Penn, Chuck Liddell, and many other great athletes.