So, who's the best heavyweight fighter in MMA today. Arguably one could say Randy Couture, but they would be wrong. Randy is a great fighter no question, but the opponents he has beaten lately all have weaknesses in areas he could take advantage of. The best fighter out there right now doesn't have any of those weaknesses, Fedor Emelianenko. Right now the buck stops at Fedor when it comes to the best heavyweight in MMA. Just one mans opinion, who happens to be a Super Genius.