>>11517813He was not a mediocre inventor. Alternating current, polyphase systems and the induction motor are big deals, and all the praise he gets for working on these is very well-earned.
That being said, Tesla was also a schizhophrenic, OCD-ridden fuck that for some reason is now considered to be some sort of unsunh hero. It's absurd that anyone takes his shit about free energy seriously, and it's crazy that some people claim him to be one of the smartest men (or even the smartest) in history.