Deventer looks fairly picturesque.
It's not as picturesque as Zwolle (don't mention that) but is one of the most "gezellig" cities in the Netherlands, although they can all change if the football team's at home. Music and book lovers, I heartily recommend this hidden gem
https://musicamoredeventer.wordpress.com/ . Wannabe soldiers (if it hadn't been for the dodgy knee) can visit the river where they filmed chunks of A Bridge Too Far.
It's a genuinely great place if you like authenticity more than loud or tacky. The cathedral, "Brink" and the town hall offer a bit of architectural goodness. Kleine and Grote Overstraat are cool in a hipstery way; a bit like The Lanes in Brighton with added umbrella art. And you get to see the Villa play Melchester Rovers in what can feel like a 1980s/90s northern English ground. Truly what early season European trips should be.