uniter
/ˈjuːnaɪtər/Definitions
1. noun
A person or thing that unites or brings together different people, groups, or things.
“The new president was seen as a uniter who could bring the country together after years of division.”
2. verb
To bring or join together different people, groups, or things.
“The community organizer worked to unite the residents and small business owners to improve the neighborhood.”