Camino de Madrid would fit the bill nicely. Maybe not so many 40k days but beautiful and not crowded.You’d only have to carry some food, as almost every stopover for the night had either a bar or grocery store.
If you want to walk longer...
Lovely report. I walked in early September 2022 and had great weather, no watercrossings (spring accounts talk about the potential of a LOT of water!).
The Torres has very little asphalt until you reach Trancoso, and then it starts in earnest...
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