Slightly leftfield, but…Macclesfield
history, architecture, “character”,
Yup
walks (hosted or map made up country/river/canal) ,
Canal, Macc Forest, Lyme Park is not far, ditto Tatton Park. Possibly some hosted town history type stuff too
bike bimbles(decent surface for Mrs),
Again, Macc Forest (might be a bit hilly though), Middlewood Way to Bollington or Adlington/Higher Poynton, even Marple if you feel like it, canal back, is basically pan flat.
decent scenery,
Peak District on one side, Cheshire Plain on the other
etc not hugely busy.
Tick
After somewhere to spend a week but want some no driving days (but public transport is ok),
Buses to Buxton, trains to Manchester and Stockport (the area up by Underbank and the market is possibly worth a trip out for the history, architecture etc)
and with some local pubs/decent food etc.
Definitely.