Salsa Cutthroat can fit up to 2.4" tires:
https://www.singletracks.com/mtb-new...and-more-gear/
I've never heard of Framed, but they apparently have a carbon drop bar bike that fits huge tires:
https://fat-bike.com/2019/04/first-l...bar-adventure/
If you're willing to do a custom build, you could probably build up a carbon XC MTB hard tail frameset with drop-bar components and a rigid fork. That's basically what that Framed Marquette is.