To stand out in the quarter turn rounds of your bodybuilding/figure competition, or to gain that gorgeous balanced fitness model look, you must work your hamstrings as hard as you do your quads.  Personally I have always separated the two workouts, working quads early in the week and hamstrings at least 3 days later.  Perform stiff leg deadlifts, with either dumbells or a  barbell with the strictest of form and always include single leg press with your foot high on the platform, making each repetition deep and focused on pushing from your hamstrings.  Give it time -  at least a few months to start seeing the benefit of your hard work.