Tesla's reputation (these days) is massively overrated.
Sure, he made some great advances, and sure he got trampled by Edison's PR machine, but...
Edison's numerous advances was a direct result of his famous 'genius is 1% inspiration, 99% perspiration' motto. He had a think-factory, as it were, that came up with ideas, and tested multiple variants to see what worked best.
The comment above that he stole employees' ideas reflects a feature, not bug. Those employees wouldn't have been paid to work on advances if Edison hadn't provided the setting.
Tesla was probably brighter than Edison - but he was also far less stable. A lot of his ideas (especially his later ones) were just wild fantasy and would never have worked.
So... Getting AC, for instance, in place sooner, and associated more with Tesla, that would be possible. But keeping him sane/focussed would have helped a lot.