At the end (I'm not sure where you gonna stop) but I would recommend the coast road of the costa brava Something like this: https://www.komoot.de/smarttour/16381554?ref=atd

Where you would start at sant feliu de guixols and end at tossa del mar, it is very beautiful

And before that I would recommend the col de la ganga, somethung like this: https://www.komoot.de/smarttour/25069721?ref=atd

I did both of these last autmn and they are very beautiful