The case for the 17th Earl of Oxford (Edward de Vere) having been the real author of Will Shakespeare's plays is actually pretty interesting (at the very least) when you delve deeply into it. (Most people who scoff at the Oxford Theory, including college English professors, apparently haven't bothered to delve into it. The theory is considered heresy.)
Of course, the Oxford Theory is nowhere near as strong as the case that Bill Ayers was the real author of
Dreams From My Father. (Most journalists who scoff at the Ayers-as-Ghostwriter Theory have never delved into it. The theory is considered heresy--i.e., racist stuff.)