I believe 6'3 and above they start to visibly lose things like co-ordination, agility, nimbleness, stamina, speed etc You compare them to smaller fighters and they can't contend. So I'd go with 6'0-6'2 and somewhere in between the light heavy and heavy guys. For size and not aesthetics I'm thinking Fedor.
If you're going by Sherdog fightfinder, it only counts MMA fights. Mirko beat Hunt in kickboxing by an easy decision. He absolutely crushed Hunt and put him on his ass with one of the cleanest high kicks ever landed. It's a great fight to watch, very techincal: http://www.dailymotion.com/relevance/search/cro+cop+hunt/video/xk87m_mirko-cro-cop-filipovic-vs-mark-hun_sport
Yup, I agree completely. Mirko has been a tad bit smaller in the past year or so, coming in at low 220's. He said this was because his ankle injury sustained in the lead up to his fight with Hunt and the subsequent surgeries kept him out of the weight room for about a year and half. He seems to have put some size back for the kongo fight.
7'2", 500 pounds of pure muscle, taken from a 500,000,000 person talent pool of athletic, 7'2" people.
I just don't get how you don't pick a guy that is naturally built like a tank, and genetically naturally strong, with a genetically granite chin.. Its like picking the stronger material when comparing Iron to titanium. Iron may be more malleable, but Titanium as a base product is just superior. This is the way I see Mark Hunt.. Ideal fighter would be a Maori or Samoan south paw trained in Muay Thai and either Judo or Combat Sambo. I shudder when I imagine an Islander with Mark Hunts size and quickness that might have crisp strikes and deadly subs with a head that will stay attatched when it is hit while DIVING into a Crocop left leg.
Being incredibly big in MMA typically isn't an asset, and I'm not just asking this based on joke fighters (like Butterbean, Bob Sapp, or Giant Silva). Ask James Thompson what being huge does in MMA. Nothing. The best fighters at heavyweight are about 6'1-6'2 and 220-230 pounds. And they're not just the best overall. Some are the best strikers (ie Cro Cop), best wrestlers (ie Couture), or best submission fighters (ie Nog/Fedor). Nog is slightly heavier than that, but he's not a superheavy.