I'm a little behind on the more recent fantasy novels out there so forgive me if some of these seem out of date
For more traditional/D&D type fantasy I'd recommend the Dragonlance series (mainly Chronicles and Legends or anything by Weiss and Hickman))or anything really from Forgotten Realms series, but as someone said before RA Salvatore is preferred from them with the character Drizzt, its hard not to like him
For really out there stuff that I've read...Piers Anthony's Xanth series XD
Some others I've enjoyed:
Tad Williams - I'm a big fan of his Memory Sorrow and Thorn series, but anything he writes is well thought out, enjoyable and the characters are so easy to relate and believe in.
David Eddings - I'm especially fond of his characters in all his stories, they are diverse and their interaction has me involved from the start of each series.
Mercedes Lackey - her ability to create whole worlds, culture and interweave different series and pull them together is wonderful.
Elizabeth Haydon - I enjoyed her series, though sometimes the main character got on my nerves, but I adore Achmed XD
Terry Brooks - Epic fantasy here if you start with Sword of Shannara but the overall Shannara series is just wonderful as it spans so much more than what seems to be a traditional type fantasy.
Jennifer Roberson - I have enjoyed her Cheysuli series of shapechangers and Sword Dancer one completely
Agree on the Robert Jordan (and now Sanderson) Wheel of Time series - very epic, lots of details and sub plots. Highly recommend you read one after the other so you don't forget anything and get lost in between books! XD
Also another I agree with is Raymond Feist, wonderful writer there!
Another series is the Half Blood Chronicles by Andre Norton and Mercedes Lackey
some with a touch of Sci-Fi
CJ Cherryh - I loved her Morgaine Cycle
Anne McCaffrey - her Pern novels I have adored for years
that's all that I can think of off the top of my head