Bright or daft he didn't have many competitors and was certainly way ahead of most of what could be described as "conventional" electrical engineering at the time, whether DC [distributed via foot thick cables and a Power Station on every street corner] or AC which he came up with "in phases" after reading German poetry! There is so much material and mystery involved that it's premature [and predictable] when someone always pops up to knock him down again.
There are many supporters but they often keep quiet about this none PC subject [as happens in the political sphere sometimes]. I'm also reminded of Eric Laithwaite and his downfall after pioneering MagLev trains. Some of us will remember him from the time when The R S Children's Lectures at Xmas were still exciting! There isn't even agreement about whether or not the FBI did take away Tesla's papers when he died in poverty but the mere existence of that story may be significant in itself
Dave