New to this site so I hope I am posting this in the correct forum.

I will be fly to Beijing this fall. I am 61 y/o, 6'5" (196cm), 275lbs (125kg) and have had 2 back surgeries. I am looking for suggestions as to which would be the best airline for a business class seat for someone my height/weight and age. I will be flying from Orlando, Florida. Thank you in advance for your assistance.