Regarding Tesla, this consulting company publishes another book which includes "How brilliant scientist and inventor Nikola Tesla destroyed himself". I guess he needed a better marketing consultant.
Hehe yeah, I agree with that article's assessment. Tesla and Edison weren't arch rivals, and both of them were important. I still find the comic fun to read :)
http://atomicacreative.com/images/ACG_EdisonAsIKnowHim.pdf