As a thought experiment, if you imagine ring species in time almost anything can "breed" with almost anything else.
Eg each human can breed with a human in the previous generation. Each chimp can breed with a chimp in the previous generation. Right back to their common ancestor.
As long as there's a common ancestor, there should be a viable chain to be followed in most cases.
Alternative view: large corps often have graduate programs that will cycle you through various parts of the business (Cap Gem's is particularly good, IMO), and make a great platform for figuring out what you want to do next.