honest person; person of integrity; straight shooter
Refers to a person who is fundamentally honest and straightforward, often implying a simple, guileless nature. Can carry a slightly naive or overly trusting connotation in some contexts.
He's an honest person, so he doesn't lie.
Sometimes honest people get the short end of the stick.
He's honest through and through and has never told a lie.
She's known around the neighborhood as an honest person.