Personally, I dont think there is an ideal size for a heavyweight. It all comes down to at what weight is their speed, strength, and endurance the best. If that is 5'10 250 lbs then so be it. If it's 6'7 215 lbs then so be it.
If you were to go up against any random top-level heavyweight boxer, what size would you like to be ? I'd fancy being at least 6'8 with about a 100-inch reach thanks. Gimme dem long arms. About 260 pounds. Maybe it wouldn't work out, maybe I'd get beat by an Ali or Holyfield sized fighter, but in all honesty I'd rather take my chances being freakin' huge.
The fighters most able to demonstrate boxing technique most associated with excellence will be the smaller heavies. This is just a matter of what I will call biological mechanics. I don't know i that means what i mean it to mean, but i'm sure most folks will understand it. In other words, a 210lb fighter is just going to look better at boxing in a vacuum. However, the 6'6 250lb athlete will have better punch resistance all things being equal, better power, all things being equal aside from allowances for improved technique, will be stronger, will have advantages in infighting and holding and will probably have a much bigger reach (you didn't specify). All in all, the bigger heavy will tend to be the better one. So it depends what you mean. We'll never see a 6'6 240lb Ali, and probably never a 6'6 240lb Liston for that matter, but the better fighters are going to be the bigger ones. I'll hold this line until 6 or 7 210lb world #1s have emerged and enjoyed some sort of prolonged dominance.
A good big one usually beats a good small one Out of those options i'd go with the Lennox Lewis mould
Without limit? I agree with everything you said. But are you saying that being 8ft is better than 7ft? Is there a point where the body mechanics for bigger boxers start to impose real hinderences outside of aesthetics/cosmetics?
Something like 6'5 and 300 lbs with elite athletic talent and well developed strength seems nice. The sport is yet to see such a specimen.
Of course size is an advantage in boxing so the larger the better. But really big guys are very rare so the chances of them having other great advantages like timing, speed or work ethic are slim. Your more likely to get a really great boxer that is closer to average size .
Ali & Holmes were in the 6-3, 6-4, and 215 to 220 lb range. They could fight both bigger and smaller guys in their prime.
The speed Ali could generate in his prime at 215 pounds....6'3" was phenomenal to behold. Both of hand and foot. His jab was timed vs SRR jab....,Ali's was quicker and considerably so.
Makes sense. Also the body type of big guys restrict them in certain areas like mobility, balance, and speed.