So basically you want to use half step gearing on the front to give you about 6.8% steps between gears. No reason it should not work theoretically though with the Rohloff chain line you may want to use a longer than standard bottom bracket axle with the crankset. The Rohloff chainline is 54mm IIRC which is about the same as the outer ring chainline on a triple crankset when normally installed. I would suggest using the Rohloff chain tensioner.

One difficulty you almost certainly will run into is finding a front derailleur that mounts low enough to work with 32 and 34 tooth chainrings. Normally the tail end of the derailleur cage is going to hit the chainstay long before the derailleur is low enough to be at the correct height for use with such small chain rings. Even changing to 17 to 34/36 gearing is not going to help this much.

MichaelW's idea of the two speed planetary geared crankset will not work as you want minimal steps between gears while the two speed geared cranksets all have very large steps between their two ratios.

BTW have you actually tried the Rohloff hub gearing? In the lower gears I find it to be more than close enough so the steps are not objectional at all.