Get yourself a modern geometry xc hardtail 29er and build it light with fast tyres.
My mate has a highball carbon. He commutes hundreds of miles a week on it across the dales and says it's as fast as any gravel bike on the road but more it's far more versatile and just so much better off road.... Surprising that. Eh. Since it's a mountain bike.
You could tour / bikepack with some bags from restrap. Build it rigid if it takes your fancy.
Saying that, I'm building up an old Explosif with 650b wheels and 47c road tyres to "commute" on. Flat bar. See how that goes, but a highball would probably be better I reckon.
My mate has a highball carbon. He commutes hundreds of miles a week on it across the dales and says it's as fast as any gravel bike on the road but more it's far more versatile and just so much better off road.... Surprising that. Eh. Since it's a mountain bike.
You could tour / bikepack with some bags from restrap. Build it rigid if it takes your fancy.
Saying that, I'm building up an old Explosif with 650b wheels and 47c road tyres to "commute" on. Flat bar. See how that goes, but a highball would probably be better I reckon.