Well, given your constraints "Speakers have to sit on a bookshelf, have a wood or white finish, and most importantly be interesting!", you could do 1 of 2 things.
1: Buy a speaker designed to be both near a wall and on a bookshelf, Ex. (some Dali models among others) and make them better sounding with X/O upgrades and add a nice wood veneer or
2) Buy a nice speaker with interesting characteristics and place them on a stand.
I have Audel Magika II using good drivers in a nice layered birch plywood cabinet. I also looked at Xavian, Penaudio, Fischer & Fischer, Audio Revival, Fritz among a few others.
I do not think any of my choices would perform best placed on a bookshelf but some of the companies offer really small monitors, new or discontinued which could work out well.