I've owned a Salsa Vaya for 8years,which was initially designed for the early days Dirty Kanza 200 gravel road race and similar(now overtaken by more specialist CF machines such as their Wardbird) and is described by Salsa as an "all road" bike.It's a steel frame,has more relaxed touring bike angles,a lower BB than many,and clearances for 42mm actual size tyres without guards,37mm actual size with.
I sold a very nice Thorn Audax machine(what's an Audax bike
)which stood unused after buying the Vaya.
I ride the Vaya on and off road on 37mm slicks(Hypers,very light supple tyres for those who don't know already)at low PSI's.The bike is extremely comfortable on all but the roughest of tracks and handles the rough stuff,even on slicks,very well indeed unless things get muddy where treaded tyres would be a better option,but I have other bikes for such conditions.
I wouldn't sell it for the earth,that's not to say it can't be bettered,but it does exactly what I want it to do.
It's a 'gravel' bike tourer