If I was limited to one lure, I would reach for a white single blade spinnerbait, HANDS DOWN! I've caught everything from bluegill and rock bass, BIG largemouth and smallmouth, to northern, and tiger musky!
The truth has been spoken. (I would also add, from personal experience) that a much higher hooking percentage will ensue if you remove the protective plastic tubing that sometimes is run up over the point and barb.)