Tesla was right about some things, and Edison was wrong about some things.
Einstein was PROBABLY wrong about quantum mechanics. Cute term. At least he battled against it versus Bohr et al. Bohr basically has prevailed, though it is very possible Einstein was right at a deeper level and QM is not the end of the line. I'm uncertain about that. Ha.
Einstein also inserted a "cosmological constant" in his theory of General Relativity, he called that his greatest mistake. Now, yet again, it may turn out there is a such a thing in a different form. But his theory predicted the Big Bang and black holes and universal expansion, but he inserted that correction because he couldn't bring himself to believe the implications. Oops.
Nonetheless, the Theory of GR is one of the greatest in all of science, a masterpiece of intuitive thinking and hard math. Einstein fairly often resorted to other to aid with the math. And what he did in 1905 is really evidence for aliens in my view.