To use panniers, you need vertical stays that stabilize rack and actually carry vertical load. The front attachment should only be there to prevent it rack from pivoting backards; shouldn't carry any actual load. You also need these racks to position panniers rearwards for thigh and heel clearance for pedaling.
Note how small front attachment is on these rack designed for panniers. The vertical stays also prevents the panniers from rocking laterally into your wheels.
I like Ibera PakRak panniers. They're waterproof and have multiple compartments. I like to keep stuff like tools and maps in some of pockets full-time.