Crankbaits on a lake without shad?

[IowaBasser]

Here in Iowa I'm on the fringe of largemouth country. If you go further north, smallmouth and walleye become popular. It makes sense that most of the people who post here are from the South (and yes, in Iowa some people consider Missouri "the South.") When talking about crankbaits, frequently the crankbaits are made to replicate shad, a major food source for southern bass, however many of the lakes I fish don't have shad.

I was hoping to hear what type of crankbaits people use when fishing a like without shad.