I love Mozart's K 576 sonata, working on it right now and it's really helping my scales. Lots of counterpoint and ambiguity with the runs too. It's tricky, but well worth the effort.
Beethoven's Op. 2 No. 2, 1st Movement is also a light piece with many scale runs and pretty interesting musically.
Please work on what you like, these are just some pieces that came to my mind immediately. And if you happen to try them, dedicate some time rather than just doing them "for fun".