I know that there are people out ther who have heard of these groups but they are still somewhat obscure... they are alos pretty good.
1. Failure
2. The Indians
3. The Sundays
4. Katherine
there's a couple more but I'll leave you guys with just those few.... by the way Failure is great, so if you have not heard of them yet, try them you may like em.
Mahavishnu Orchestra
Return To Forever
Weather Report
Al Di Meola (They are well known in the right circles, but most people are clueless)
In America Porcupine Tree is pretty obscure...even though they are amazing, although after FOABP they are getting alot more recognition.
Pineapple Thief
Marillion.
Spocks Beard
Sleepytime Gorilla Museum
Bacamarte
Black Bonzo
ARSNOVA (the Asian chick trio, I think there are a few other bands with this name...They are sort of a Emerson, Lake , and Palmer clone, in the regard that they play bass, keys and drums, and are obviously influenced by them.)
Camel (at least in the US)
King Crimson - (US again...and it's not just the youth, I swear most people think Led Zeppelin, The Beatles,Black Sabbath ,The Who, Pink Floyd,etc. were the only music acts in the 60's and 70's...and King Crimson just released a new album a few years ago! A good one at that!)
Magma
The Flower Kings
Just to name some..