One thing I've noticed about bikepacking frames, and mountain bike frames, is they have a top tube with an unusually pronounced slope, and to compensate, the seatpost has to be extra long.

For example, the Salsa Fargo:


compared to a more traditional touring geometry, the Fuji Touring:


The Salsa's top tube is almost parallel to its seat stays, and it meets the seat tube below the point where the seat stays do. And this is one of the less extreme examples; it gets worse from there. I've never understood why almost all mountain bikes have top tubes like this; does anyone know the reason?

I'm looking for a bikepacking frame, with these features:

1. Cromoly
2. 29" wheels
3. Clearance for 2.5" tires (up to 3" might be even better)
4. Clearance for 100 mm of front suspension
5. A more traditional touring geometry

Does anyone know of such a frame?