I second the Steelcase Leap if only for cost reasons, since it's an office staple and could be found all day for around $200 in decent shape (vs. $1000 new) and unlike the Herman Miller competition, the Steelcase Leap v2 is one size fits all with fewer if any optional accessories, making buying one used incredibly simple.
I have a leap v1 I got about 5 or 6 years ago that was reupholstered by a local used office furniture place. I keep using cheap cylinders, so I've changed that out a couple of times, and I changed out the original armests about two years ago (bought from Crandall for that). All in, including the original purchase, I'm at maybe $350 over the entire time I've owned it, and the structural parts and new upholstery are holding up perfectly. The tag on the bottom says it is 22 years old.
The other side of my home office has a HM Mirra v1 I got for free when they shut down my employer's local office, and my wife uses a Steelcase Gesture in the "study," which is to say the nice home office that doesn't have two 3D printers, a soldering station, half a dozen keyboards, a dog crate, and an elderly cockatiel. My 10yo uses a godawful "gaming chair," but it's pink and she's ten, so ergonomics are barely a blip on her radar. She has a standing offer to take the Mirra.