I've used Eden olive oil and it is a nice buttery taste...(rated with highest squalene level too!)
Some of the Greek oils in the grocery stores have a stronger taste.
Whole foods also has a selection of different olive oils, not just their 365 brand.
In my cooking class I purchased 10 or so different oils so the class could taste the difference...and there are great differences in flavor...and I just purchased them off the shelves (gourmet shops, local grocery stores, etc.)
Thoreau said, 'A man is rich in proportion to the things he can leave alone.'