Struggling to Find the PERFECT Ergonomic Office Chair – Any Specific Recommendations?

I've been working from home for a year now and my back is screaming. I'm desperately trying to find an ergonomic office chair that truly supports the lower back and has fully adjustable armrests, but every option I look at either has terrible reviews for comfort or is astronomically expensive. Has anyone found a specific model or brand they absolutely swear by that isn't a fortune?