The gravelkings are so popular they're certainly worth a try. I have no experience.

But if you haven't tried them yet, Continental GP5000s in 32 mm run true to size and roll fantastically. No flat in ~2000 miles and they give me more than one additional mph vs. 35 mm Schwalbe Marathons, pumped up well. I have a standard route where I put in some effort and use Strava to keep track. I was amazed by how repeatable this is. The GPs are my favorite tire and I try to do all long rides on them.

They're fine on the gravel roads around here. It's pretty flat.

If there's glass to worry about, Schwalbe every time, and pedal harder.
cheers -mathias