I ride roughly the same ratio of gravel/pavement as you, and really like the Rene Herse Barlow Pass. This is on the one bike that I do all of my paved and unpaved road riding on. Yes, it does struggle in mud, but in the grand scheme of things, that is a tiny fraction of the miles I put in, and I just go slower there, or just go around it. I guess it comes down to how much of the time you are actually needing to ride in mud.
I have considered one of the RH knobbies for a more gravel/light trail use.