What's the adjective for harmonisers? Here's the word you're looking for.
Included below are past participle and present participle forms for the
verbs harmonize and harmonise which may be used as adjectives within certain contexts.
“When the soul hears harmonious music, it is reminded of the celestial harmony it perceived before entering matter.”
“His personality was a harmonious blend of a saint, spiritual scientist, yogi, philosopher, psychologist, writer, reformer, freedom fighter, researcher, eminent scholar, and visionary.”
“Again, it was the patron's role to mediate between the artist and the press, ensuring a harmonious relationship on both sides.”