I'm a similar build to you and just ordered this guy:
I tried a Leap (not plus) and bottomed out in it immediately finding it very uncomfortable.
I ordered the Serta because my current chair of 5 years is a Serta and it has treated me fairly well (not perfect but pretty good), or at least better than anything else I've tried so far (Aeron, Leap, Tempur Pedic).
I plan to report back once I get it and assemble it.
I'm in a similar position as you but haven't made a decision yet.
I tried a tempur pedic chair but it says 250 and they mean it, the cushion just didn't cut it.
I currently use a Serta comfort coil chair which is ok but gives me pains after a while. It's also like 4 or 5 years old.
Steelcase leap and gesture seem to get recommended a lot. I've been looking at those and also possibly another Serta.
The reviews aren't great, but I've been considering this guy:
If you find something you like, please let me know!
I'm a car person...the last fucking thing I want to sit in all day is a racing seat. They're genuinely not comfortable. Why do I need bolsters when I'm not experiencing lateral Gs?
You want comfy? Give me this thing. Had a boss who had one, it was amazing to sit in on occasion.
My heart reaches out to you for the pain you're going through, but may I recommend you try this chair in the future?
I know several who own it, one who is most assuredly big and tall (about 6'3 and well over 300 lbs), says it is the best chair he's ever used.
i’d go for this over a gaming chair. it’s what i have and has lasted well over 8 years now.