I am constantly finding new SF authors (new to me) and enjoying them. I've been reading Science Fiction for over 45 years. IMO it is far from dying, far from being only one sub-genre deep and far from having a concrete, set-in-stone definition. Like in the past, some soars, some leaves you breathless, and some would be used as kindling (original meaning) if it weren't electronic.
New to me authors I would happily recommend include Nathan Lowell, Connie Willis, Randolph Lalonde, Kristine Kathryn Rusch, David Drake. But then, I grew up on Heinlein, Asimov, Clarke, Ellison, M.Z. Bradley, Tolkein--so what do I know?
I'm not enamoured with Sci-Fi (or SyFy) but I've given up on trying to change things.