As usual, I agree with Gollum here - Erikson's the master of epic fantasy, Bakker and Martin are the other two authors on the same level as him, and Jordan is trailing a long way behind.
While there are no great stylists in epic fantasy I can think of, Jordan stands out to me as one of the weakest - he utilises awful overdescription and he's no good at description. (And by comparison, I, Brian is improving his by cutting down his novel from what was some very good, if overdrawn description, while Jordan could never hope to achieve the former, let alone the latter). Bakker's the best prose writer, but in epic fantasy, it tends to be the other factors that are important.
So in plot and characterisation does Jordan stand up? No - he starts by copying Tolkien, and is coming to the end of the series by forgetting that he even had a plot. His characters are laughably unrealistic and cliched, and the female characters tend to be interchangeable.
What about worldbuilding? His greatest strength, and it still seems to consist of little more than standard cliches, with brief hints of imagination. Take a look at Bakker's far more clever approach, of deliberately taking a traditional fantasy story and creating something entirely new out of it - Tolkien without the sentimentalism. (This is what he says himself, and it seems pretty accurate).
Though I keep mentioning Bakker, I still think Erikson and Martin are slightly better than him, in that order. That said, Bakker's the only one to have a completed epic fantasy series of these three.
As for other epic fantasy series, I'd think of JV Jones' Sword of Shadows, Greg Keyes' Kingdom of Bone and Thorn, and particularly Patricia McKillip's Riddlemaster trilogy.
