Obscure bands

it seems like this thread has turned into a mostly progressive rock discussion.  Many of the groups mentioned don't really seem to me to be "obscure", but then, I guess that's because I know about them already ;-)

Here's some more I haven't seen mentioned:

Gordion Knot
Chroma Key
OSI
Illusion

I hope I didn't forget Solaris.
https://www.youtube.com/watch?v=W7VI18Zd0b4

I listen to a lot of modern underground metal, so it's all obscure, except to metal-heads, but since this is more of an audiophile's forum I would recommend more of a progressive jazz with a tinge of metal ...

Animals As Leaders - The Joy of Motion

Ex Dead Teenagers

N

Saw Davey Knowles tonight. He was great.
  "A musical phenomenon...a guitar prodigy" Paul Sexton, The Sunday Times"
https://www.youtube.com/watch?v=OznU8W4-9dQ