a good scout
An honest, affable, reliable, and trustworthy person. Your dad's a good scout, you know that? He's helped me out of so many jams without even thinking twice.
good scout, a
An amiable person. This slangy expression originated in America, probably in the late nineteenth century. It appeared in Meredith Nicholson’s Hoosier Chronicle of 1912: “Dad’s a good old scout.”