If ever there were one that deserved to be built, it was the Grindleford, Baslow & Bakewell, which actually made a junction at Hassop if I remember correctly, rather than Bakewell. The topography was not bad for the Peak District. I think the Midland had proposed to bypass the Chatsworth Estate by building a similar route towards Manchester, way back before the Monsal Dale route was chosen instead.
The other two standard gauge schemes sound almost as far-fetched as the LD&EC route west of Chesterfield. There was some formidable terrain to cross in both routes, I think.