I've mentioned this a couple of times. I found a Sartori Harmony, very reasonable price. I'm an old guy, ride a variety of surfaces, paved, unpaved and gravel. It takes the sting out the bumps and potholes. Worth a look. I have one on both my bikes, a gravel bike and a Trek DS.
https://www.amazon.com/Zoom-Harmony-.../dp/B076G82G9H
P.S. couldn't bring myself to spend $100-$200 on a seat post.