May be you can find an fretless fender jazz bass on jaco pastorius or rickenbacker double neck on geddy lee or chris squier. But most beatiful bass is alembic from 25 years ago - new instruments are ugly -. You can contact with alembic and get a stanley clark picture.
But there are more beatiful instruments in bass range , archilute , theorbo or chittarone lutes pictures. If you interested in most beatiful bass you can find on that earth , its oberlinger organ in st nikolai kirsche at romerberg , frankfurt am main germany.