The Stigmata has clearance up to 45s. I just got some 42 (Resolutes) and 40s (Elwoods) that apparently measure around 44 so we will find out soon. The 40 Ramblers look a bit undersized but could be 40s and I have a lot of room. I think the Diverge can clear 47s. I signed up for a 65 mile (the shorter version) ride in July with maybe 5000-6000 ft of climbing. I can do that or the 95 miler, but the 65 sounds more sensible, at this point.
The NEWER Diverges can clear big rubber, but have a longer, slacker wheelbase. The original snappier Diverge can clear only 38c, but are better all-purpose road/gravel bikes.
I don't mind slightly slacker bikes since I have been mountain biking for decades but man- that Evil gravel bike is ridiculous with a 66 degree head tube angle, Who thought that would work for more than a handful of riders! My Stigmata is around 72. When I build a custom bike, I'll prob keep it between 70-71 with a 73.5 degree test tube angle.
I do really really like the Future Shock though I'd pass on that for the Moots YBB and use a Redshit stem to get some Cush. Well, in theory since Moots will set me back around 8K-10K and I'm not sure I'm ready for that.