I really enjoy Scarlatti!
I second BartK’s recommendations: I find all 3 addictive.
In addition, I’d suggest K32 as a taster: it’s very short and easy, and utterly charming.
I also like K8 and K531
All the above are in Henle Book IV - except for K380 which is in Book I, but it is so much fun to play I decided it’s worth buying a whole additional book for…