As a 6 foot tall, 240 pound man, finding a comfortable chair is not easy. Musso’s Ergonomic Camouflage Gaming Chair comes a long way to meeting my needs. The assembly was not time consuming, but it does require attention to detail. The only tool you need is included with the components, and you should be able to use it on future projects.
https://www.amazon.com/Ergonomic-Adjustable-Esports-High-Back-Executive/dp/B07R7PJ5WP