Hi Teppi and welcome to TE.

I'm curious as to why you want to go with a traditional diamond frame rather than a recumbent. There are some pretty zippy and responsive recumbents that are excellent for distance riding. A bent bike offer better aerodynamic position, comfort in the seat, less strain on hands, wrists, elbows, neck and shoulders.

Have you considered a crank forward bent bike like the Rans Fusion?

If you prefer the other frame, I can suggest either a 'plush' bike or cyclocross bike with an adjustable stem and touring handlebars and a Brooks sprung saddle. Some people ride mountain bikes set up for touring as well.