As this is under books, I'll stick to just books.
Of course, the epic of all epics is the "Lord of the Rings" trilogy. This is a must read.
I've also liked "The Original Shannara Trilogy" and have written Book Reviews on them. "The Sword of Shannara," "The Elfstones of Shannara," and "The Wishsong of Shannara." "The First King of Shannara" is the prequel to the trilogy, but I'd read the trilogy before the prequel in this case. It was written in that order by Terry Brooks.
I've also read Anne McCaffrey's Dragon Riders of Pern books. I found them really mediocre. I'm currently reading Terry Goodkind's "Wizard's First Rule," and am not sure yet what I think of them.
"Eragon" by Chistopher Paolini is an interesting book as the author was only 15 when he wrote it. It's also designed as a "young adult" book. With that in mind, it's rather fun to read. I've also written a book review on it.
I hope this gives you a few more options. I know there are some really great Fantasy and SciFi that I haven't read myself. :)