Respectfully disagree again. Different chairs suit different people. Whilst it's dead easy to keep trotting out the buy a steelcase or Herman miller as they are great chairs, they will not suit everyone. Equally the people saying that gaming chairs are uncomfortable and no one should buy one, that's incorrect - they are absolutely fine for some people.Respectfully disagree, HM Aeron or Steelcase Leap/Gesture will be more comfortable for long sitting sessions than a typical gaming chair.
I've got an expensive but generic ergonomic chair at work (provided by our HSE department) and it's merely ok, it's certainly not what I'd class as comfortable. And yet I've got a cheap £50 IKEA chair, a 15 year old Argos executive chair and the kids have Noblechairs, and I find all of them to be more comfortable.
Ultimately you need to try before you buy, and ideally (but not normally possible) and extended trial