This product was mentioned in
with an average of
Try something like this. I'm as tall as you, and while I'm nowhere close to the weight rating of this chair, I chose it for the solid construction.
SPACE Seating Big and Tall AirGrid Back and Padded Mesh Seat, Adjustable Arms, Gunmetal Finish Base Ergonomic Managers Chair, Black [link]
I’ve found this site has pretty good options in their other sections and would trust this recommendation, especially after reading the Amazon reviews. [link]
So I was looking at options and this thing is on an absurd discount right now if you're in the US:
Sourced from this article which you may find helpful:
I'm a big man. I've had mine for 2 years and it's solid. I left the arms off.
Just got this monster in (once you lift one you’ll understand what I mean), so far worth every penny!
Well if you're happy with it I guess that's what matters, but they do make big and tall office chairs, for example this one has excellent reviews and it's a $800 chair you can get for under $400: