I’ve done the Ridgeway all the way to Lyme Regis and it was great. Took a couple of days, but you can split and just do a days ride.. I waited for a dry break in the weather for a couple of weeks, which was worth waiting for.
I’d offer up the NCN72 Hadrians Wall route Coast to Coast, starts just south of Whitehaven then bumbles along the Northern Pennines and follows the Wall to Whitley Bay.
I’m doing it in a few weeks, taking 3 days but might make that 4, and BnB’ing it across.
That Peaks route ^^ looks ace, I’ll nick that thanks, I know the Peaks well and haven’t been back for 10 years so it’ll be a great revisit.
Failing all this, why not just dip your nose into the Sustrans website. Whilst the NCN’s tend to be on road, there are a lot of offroad sections that will make you sweat a bit. I use Sustrans routes a lot when planning.