If you are OK with small knobs, I've had very good luck with Donnelly X'Plor MSOs. Very tough and fairly fast rolling. If you want something totaly reliable,look no further.
I actually am currently running Rene Herse (Compass) Snoqualmie Pass 44s on my gravel bike and absolutely love them. Really, really fast and compliant. They are definitely thin walled, though. It's a risk I'm willing to accept for that incredible ride.