Currently my two favorite epic fantasy series are:
A song of Ice and Fire by George RR Martin
Malazan Book of the Fallen by Steven Erikson
These two series are the best of the best in my opinion.. the George RR Martin series is still incomplete but Steven Erikson's will be fully published as of next month!
I highly recommend either to anyone who enjoy fantasy, especially fantistorical (in the case of a Song of Ice and Fire).