Ouch. You liked Eragon? Then I'm not sure my choices would appeal to you. Here's a few series I really enjoyed -
A Song of Ice & Fire - George R.R. Martin (Dark fantasy. Very dark. I'm not sure you'd like it, judging from the books that you have read.)
Any of Robin Hobb's books (The Assasin trilogy is said to be her most popular. I liked the Liveship Traders better. C= )
The Night Angel Trilogy (Brent Weeks is WIN)
The First Law Trilogy (Joe Abercrombie is even more WIN)
Magician (It is my personal opinion that Feist's first book was his best, but meh.)
I'm currently getting into David Gemmel, and man he's good. I want to kick myself for not reading him earlier.
But, yeah.
Brent Weeks and
Joe Abercrombie. Read them. Love them. Stalk them in their sleep. >
I didn't like Wheel of Time. I honestly couldn't get into it. I got halfway through the first book and everything was so 'meh' so I dropped the series after the first book. ><;;
EDIT:
Here are some that I have enjoyed:
Myrren's Gift: the Quickening book one --by Fiona McIntosh
Blood and Memory: the Quickening book two --by Fiona McIntosh
Bridge of Souls: the Quickening book three --by Fiona McIntosh
Magyk: Septimus Heap book one --by Angie Sage
Flyte: Septimus Heap book two --by Angie Sage
Physik: Septimus Heap book three --by Angie Sage
Queste: Septimus Heap book four --by Angie Sage
...and more to come.
The Dresden Files by Jim Butcher. I haven't read them myself, but am going to. If you liked Harry Potter (I certainly have) then you might enjoy these. There are eleven books out but I think the twelfth one is coming out soon.
Whoops. I missed this. I read McIntosh. She was... 'eh'. The concept was great, the execution not so much. When the big bad died it was a little bit of a let-down for me, and so was the flat characterization.