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I haven't ordered it yet, but this is what I'm thinking about getting. I'm shorter and heavier than you, so take it with a grain of salt.
personally i prefer cloth cushion chairs to leather ones. I find the leather rips over time and the fabric ones last way longer.
something like this:
I found my chair while looking at chairs for really heavy people... https://www.amazon.com/HERCULES-Capacity-Fabric-Executive-Adjustable/dp/B00CP3M1DE
They're huge and comfy.