Harmonious means to be in agreement or balanced, where different elements work together peacefully and create a pleasant or satisfying effect. Full definition
(3) Future - focused: Coaching in the collaborative dialogue, conflict resolution, anger management, and positivity skills that can enable more harmonious relationships in the years ahead. (goodtherapy.org)
I also wanted to create a mix and a better balance between shapes and form, a more harmonious blend of clean - lined and ornate furniture. (deeplysouthernhome.com)
I think this was my favorite piece in the show, because of the way it seemed to bring every other object on view in the gallery together in harmonious relationship. (badatsports.com)