A person who gives money or other help to a person or an organization such as a school or charity (Oxford)
Someone who gives money to help an organization, society, or person (Cambridge)
The equipment was funded by friends and benefactors of the hospital. (Oxford)
They hope to find a benefactor, and turn the factory into a museum. (Cambridge)
funded by friends and benefactors
hope to find a benefactor
Contributor
Supporter
Opponent
Antagonist
Benefaction