There's no single "best" exercise that'll work perfectly to grow and shape everyone's quads. Muscle growth itself is based on many factors — not just exercising!
That said, many movements that made it into this workout can create dependable tension that'll help you work toward bigger quads over time (along with mindful attention to many of the other lifestyle and diet factors that grows muscles).
Exercises like slow, controlled squats, lunges, iso holds, wall sits, bridges, and more help apply steady demand onto your quads and can be incorporated into a thoughtful muscle-growth regimen at several stages.