Definitely the Salzedo. Also some of the Camac harps. An Athena, Atlantide, or Blue, but with plain soundboard. Also the L&H 100.
Nothing makes a harp look more girly than flowers and frilly designs on the soundboard. A Celtic design on a lever harp is fine, and the decoration on the Salzedo I like, but otherwise I tend to not like most soundboard decoration.
I know when I finally make the plunge to buy a new harp I am going to have to special order it. I never see harps I like in the finish I like with no decoration on the soundboard.