I am 6'3 250lbs with a bad back after many injuries.
I bought this chair two years ago and it's still like new. It's the most comfortable thing I have ever sat in. I have no doubt this is perfect for you.
Alera Fraze High-Back Swivel/Tilt Chair, Black Leather https://www.amazon.com/dp/B004C1RULU/ref=cm_sw_r_cp_apa_bbEeAbVQMHMJD
This is a great chair, had it for 3 years now... padding and leather still in good shape.
The padding is firm though, not sure if you care (I don't). Still you'll be hard pressed to find a leather chair this cheap and this good elsewhere. If you see the 5* review on Newegg that's my review, I still stand by this chair.
Alera Fraze High-Back Swivel/Tilt Chair, Black Leather https://www.amazon.com/dp/B004C1RULU/ref=cm_sw_r_other_apa_M-MGxbKYGBBMB
This chair is the shit. Super comfy, nicely padded and it looks great. The quality is really nice too, it exceeded my expectations for the price.
I looked for a desk for months. Finally wound up going with a dining room dinner table since it offered me more than two feet of depth.
I think it turned out looking pretty nice.
Edit: It's incredibly comfortable. Tends to get squeaky but some WD-40 will fix that.