Just for info, as you don't want a MTB, but there is a MTB version of the nice Precision road frame.
This runs 26"/559 wheels, U-brake fittings on the back and a steel unicrown fork for cantis.
Here's mine...apologies for the non-matching tyres:
It has terrible ground and rear tyre clearance, is heavy, stiff and is pretty big for a MTB frame at around 22", so Kirk developed the ill-fated e-stay Revolution.
All the best,