That's a pretty specific set of requirements. My SO and I don't usually agree on what's a 'comfortable' task chair even when we're both there to try them.
Yes, when I read your post rL I thought to myself that it was a bit akin to recommending the right pair of jeans to someone. Even if I spent a lot of time in a task chair, which I don't, what I find comfortable may bear little resemblance to what will suit you.
Thanks for the link. Mesh back is fine. The problem with mesh seat it is too hard for long internet meetings. This is what I have now with no adjustable lumbar. So time to upgrade