I think old country would be best- songs that you have more than likely heard at one point in your life whether you listen to country or not-
Alabama- Song of the South (classic kinda silly southern song about a person during the depression- but the chorus is cool)
Alabama- Mountain Music (just as the title say)
Anything Kenny Rodgers- sings the song "you gotta know when to hold them- know when to fold them" I can't think of the title but those are song lyrics of the chorus- I know you have heard it
Garth Brooks- he has both silly and serious songs- look at a greatest hits album
He has lots (I don't usually like country but I love Garth)
Randy Travis- Forever and Ever
Charlie Daniels- Devil went down to Georgia
Ray Stevens- The day the squirrel went bazerk (This song is HILARIOUS)
Those are all I can think of for now- these are songs of my childhood some of which I think everyone knows. I don't know how appropriate they are for what you are looking for but it is a start