Till today I used to think that I am the only one who wants to sit on a chair mostly cross-legged. Gladly, I have companions and I was working cross-legged even when my office was operational. Once, I even got scolded as my previous organization's CEO was on a routine check and I was making myself feel at home on my lovely chair. This is the chair I found for you for your comfort. Maybe this could help as per your specifications: https://www.amazon.com/Essentials-OFM-Executive-Ergonomic-Managers/dp/B06XR954J8/ref=sr_1_5?dchild=1&keywords=broad+seat+revolving+chair&qid=1619368823&sr=8-5

Cheers!!!