Not “nice”, but my Kona Honzo ST is really fun and has modern cross countryish numbers. Not the new slack thing that they sell complete, but the ST that’s frame only right now.
I ride it with a 120 fork, and flat bars, and my bars are at or just below my saddle height. (Saddle height dependent) My position is pretty XCish and that’s how I ride it.
Also the frame, if you can get it, is much more affordable than the boutique options.