Anything from Leader Games and illustrated by Kyle Ferrin (Root, Oath, Fort…) feels like cheating but still, I absolutely adore their art style
Everdell, Photosynthesis, Parks, look nice as well
I also bought an updated edition of Costa Tuna just because of the illustrations: https://www.pamwishbow.com/client-work/project-four-yjynj-pafyx
Yes, Inis(pronounced Inish) is glorious in it’s artwork. Makes the Celtic theme really pop.
I also very much like the artwork in It’s a Wonderful World. An engine-builder with lovely character.