Dear Avira,
And on that pretty long list is some of our greatest Torah Geniuses. So, how are you making a point here? You could just admit that you don’t learn any authentic chassidus after Tanya. Nobody will look unkindly at you for it. Many Chassidum don’t learn real chassidus either.
Not what the Gemara says. And anyways the contradiction is in the Gemara itself. So don’t blame it on the Rebbe.
The Goan isn’t a proof to anything. It is more likely he agreed with Sechel83 on this one.