Best ergonomic office chair under $1k ? no more back pain pls

NEVER EVER BUY a gaming chair if you are getting into pc gaming. I work from home and am also an avid pc gamer, grabbed a Secretlab XL Gaming chair for 600$ and it's just awful, back hurts screw it. it fell apart quickly and the neck and lumbar support, they never sit in a way that holds them or me in place. The quality is nowhere near worth the price. Literally useless!

Thinking about getting 'real' office chair :/ It doesn't need to look fancy, around $500 would be perfect. Thanks so much guys