Certainly mention publications and prizes, but I wouldn’t mention the earlier works upon first approach. The fact that you have five unpublished projects could be daunting in the context of an initial pitch, and I’d assume most of them had already been shopped at some point if you didn’t say otherwise. Generally, I’d advise focusing on a lead project and on your bio. However, because you’re passionate about more than one form, I think it would be good to convey that you write both fiction and nonfiction. Some agents may only want one or the other, while others may be more interested in the fact you do both.
I write literary fiction and have completed four novels and one hundred pages of a memoir with a proposal. I’ve published extensively in literary journals and anthologies—stories excerpted from the novels, in addition to others—and several have won prizes. When I approach an agent about one manuscript, should I cite the breadth of completed work?