Don't get me wrong: I'm very impressed with Tesla's genius and quiet personality. But as a MythBusters episode pointed out (in which they tested Tesla's alleged earthquake machine), he was in trouble financially in his later years, and made all sorts of wild claims to try and win over investors - like the antiaircraft death ray. That, and several other crazy-sounding inventions made me cast some doubt over how many of his discoveries and inventions were actually real. Somehow, if all our modern technology is unable to even replicate the stuff he (allegedly) did (like when he powered a load of lightbulbs in the middle of the desert), something tells me that it's suspect. I may be wrong, of course, in which case I would respect Tesla even more than I do now.
Oh, and my criteria is total number of built inventions, devices, and discoveries.