Erikson, very closely followed by R Scott Bakker and George RR Martin. To be honest though, all are as good as one another. Martin is probably 3rd out of them at the moment, because with AFFC he showed signs of slipping a bit, but then again A Storm of Swords is one of the best epic fantasy novels ever written.
Jordan just isn't close. He's closer to the bottom of epic fantasy IMO than the top.
As for others - well there are so many, it's difficult to know where to start, but a few I'd suggest would be Mervyn Peake's Gormenghast, Fritz Leiber's Lankhmar, Jack Vance's Tales of the Dying Earth, Roger Zelazny's Chronicles of Amber, and for some more recent novels, China Mieville's Perdido Street Station, Matthew Stover's Heroes Die and Graham Joyce's the Tooth Fairy. Here are some more comprehensive lists:
http://speculativereviews.blogspot.c...n-reading.html - William Lexner's list
http://www.fantasybookspot.com/forum...opic.php?t=471 - Jay Tomio's list
http://vanderworld.blogspot.com/2006...y-reading.html Jeff Vandermeer's "exhaustive" list
http://vanderworld.blogspot.com/2006...tasy-list.html - Jeff Vandermeer's even more exhaustive list
And you might want to check out the winners of the World Fantasy Award, the Hugos, the Nebulas and the British Science Fiction and Fantasy awards.