Yeah, the brand I went with was concept seating. I’m about 6’7” around 400 pounds - fat gut, big bones, decent amount of muscle - was a lineman before I got crippled. I am 100% a fatass, no excuse, but also big in other dimensions as well. Most chairs, even the big and tall ones from staples and the like, will get a bit of a gangster lean after a year or so of use as the chairs base plate slowly warps and tack welds come loose. You can grind it down and patch up the welds, but not much to be done about the plate warp. The concept seating chair I got has a massively thick base plate that seems like it will hold up to a lot more. One other thing I really like about the one I got is that it doesn’t have the most common failure point, the piston. Instead it has a fuck off huge solid threaded shaft that you use to screw the chair to the right height then lock it with a massive lock washer. Additionally it doesn’t recline or move in any other way other than to spin and roll. You can loosen bolts to adjust the fit then tighten them back up, but nothing is easily adjustable with levers and stuff which I love because those are just failure points and I’d much rather spend the time to set it up once Ave never worry about it again

Herman Miller or Steelcase.

I bought a pair of used (probably dot-com-era surplus) Herman Miller Aeron chairs for me and my wife over a decade ago for like $350 (don't remember if that was for the pair or per-chair; either way it was a bargain) and they're still going strong.