Best comp I can find for Garry Harris is Bradley Beal. Both 6'5. Harris slightly heavier at 210 lbs, vs Beal's 202 lbs. Beal shot 40% from 3's in college vs Harris' 35%, but if you believe Harris' stroke is legit then you'd take him.
Beal is playing well for the Wizards right now. I would take a long hard look at Harris at a #8.
Beal has ways to create offense, Harris doesn't.