What other figures does Gulliver call back from the dead, in Part 3, Chapter 8 and why? What else does he learn from them?

Gulliver sees both Homer and Aristotle and he also calls up the ancestor of certain houses of nobility in England, just to see what they all look like. However, he can't resist asking questions and learning about their histories. As a result, he learns that almost all of them were quite corrupt, which is, perhaps, more information than he wanted.