Herman miller aeron. Company purchased them in bulk back in 2015 and I can say they are still going strong. Herman is a shit company though but products are high quality in terms of office chairs.
I got the Steelcase Leap v2 during the pandemic and WFH in 2020. It is still a great chair.
Steelcase Series 1, there is no way I am ever going back to half-assed "gaming" chairs ever again.
I have bought many steelcase leap v1 and v2 chairs used, definitely these chairs are awesome!
Leap V1 here, got it used about 6 years ago before pandemic inflation, and I use it for WFH and my home desktop, so it has my ass in it a LOT. It’s still going strong, with nothing wrong except replacing armrest pads once and replacing the cylinder twice (I buy them cheap though). Not the cushioniest seat, but that’s not really what these chairs are about.
I also have a HM Mirra v1 that I got for free when our company’s last local office shut down (they wouldn’t let me have an Aeron though, lol). My wife’s home office has a fancy Steelcase Gesture I got her (open box… she wouldn’t have anything else, lol) to help with her back without wrecking the aesthetic she wanted in the room. Her old chair was one of those quilted pleather unergonomic monstrosities.
Steelcase Leap V2. You can get them refurbished from Crandall for mid-range prices :)
I like the kind that's springy mesh stretched over a frame. The exact brand isn't that important. They're so much more comfortable to sit in for long periods compared to solid chairs, to me.
I have an Ikea Langfjall chair in the high-back model, which doesn't seem to be sold in the USA anymore, at least. (I can find it on the British site though). Not quite head-rest height, but tall enough. It's supremely comfortable in a stiff, regimented posture kind of way, and the Ikea Office stuff is (expensive but) some of the sturdiest and most durable Ikea stuff I've ever owned. I bought it right when it was first released in 2019, it's got a 10 year warranty, I expect it'll last twice that.
Custom Truly chair.
The one I found for free on the side of the street
Colamy Atlas. It is comfortable and very well-built for its reasonable price.
A standing desk (coupled with a good floor mat, to help the feet/back), and when I sit it's on a gamer chair whose brand I can't recall that's comfy and that was given to me.
If anyone is wondering, I'm not really a gamer. The chair is just comfy ;)
I'm a weirdo and switched from a stand/sit desk with a Steelcase Gesture with floating split keyboard on the arms to a floor cushion and a coffee table. It's helped my knees, back, and pelvic floor so much. I never plan on using a desk daily again.
Ahrend 220. Got 2 of them. Got them second hand, only had to fix some squeeking parts with some WD-40.
They are still sold refurbished because they are really well made, EU norm certification for working safe. They started making them in 1994, and have been in production for 20 years.
Raynor Ergohuman. It's fine but when it breaks I'm replacing it with something different, probably a Herman Miller.
Bed.
