personally i like the right hook from Africa, haha i saw a 6'10" bouncer (weighing close to 420 and was an amateur boxer) land the most devasting punch i've ever seen, the guy came towards him, he turned around stepped into it with all his weight and hit the guy running towards him at optimal range. the guys head nearly came off his body, whipping his neck backwards and sent him back in the air horizontally about 15 feet or more. ambulance soon came, broken neck, spinal cord and his face was mangled with his jaw being broken his cheek bones shattered, nose completely crushed, both orbitals shattered and back of his skull cracked with a few teeth missing. and from what i''ve heard this guy is still in critical but stable condition in GWUniversity hospital, and will never again walk, talk, or eat normally. Bouncer would've been in deep shit but after looking at this guys prior fighting and violence record, charges were dropped (the 10 or so witnessed didnt hurt either).
i dont know why i got into this random story but it seemed like a cool fighting story.....hey big guy, you can do some damage so dont be afraid to get ur ass handed to you at first, and let me tell you if you know a couple solid takedowns and holds, your big ass can definitely inflict a major amount of damage in just a few hits. so yuo'd be a threat to the majority of the population, which is probably your underlying goal...