Key bit of info we need is how long a ride you want?
As BH says, Edale is right at the centre of the best MTB in the Peak. You could grind up Chape Gate and down Jacobs in less than an hour or expand it to include 100km of great trails.
What sort of height gain do you want?
Route 1, as above is Chapel, Slabs ( future Bridleway), Jacobs. Must be about 400m of height gain and 14km
Option 2 expands it to include Rushup Edge and Hollins Cross ascent instead of Chapel Gate (600m, 20km)
: https://strava.app.link/kQIkvOclHpb
Option 3 is the classic Jacobs route except with the hellish Coldwell Clough clim replaced by a much nicer one: (1000m, 28km ): https://strava.app.link/b4pnq9AlHpb
Option 4 excludes Jacobs, but includes good stuff like Cavedale, Beast, Roman Road etc. Good if you can persuade someone to shuttle you up to Mam Nick: (34km 1300m)
: https://strava.app.link/0zTrkSJlHpb
Then Option 5 cobbles together 9 of the supposed 10 best descents in the Peak for an all day epic (77km, ~2400m)
https://strava.app.link/3J6bcpXlHpb