I don't know of any book that teaches harmony especially for students particularly interested in composition - apart from perhaps the Schillinger System - They must exist!Personally I also like the Walter Piston book on harmony - because the examples he gives, shows how chords are actually applied in Orchestral and Piano writing - although the orchestral examples are reduced - it would have been hard to have included full-score examples. I think the Schoenberg books on Harmony and Composition are also excellent.
Just to give another point of view, all theory/harmony books use musical examples for the topic that you're learning (V7 and inversions, subdominant functions, augmented 6 chords, counterpoint, whatever). Personally, I detest the Piston harmony books. So incredibly boring. I've used Tonal Harmony by Kostka and Payne, though I am not aware of books that work through harmony AND composition.Enjoy your studies.