Jens Johansson,
Psychedelia to the extreme. He will take you down a very twisting road, with some of the most amazing keyboard work imaginable.
It's funny but I have a thread now on good music to judge soundstage by, and Jens Johansson surely is on my list.
There is one cut that has his synth making what sounds like a whirling dervish running around in an 8 foot circle between the speakers and you, in 3D. His effects are really quite astounding, and I have no idea how he does it.
Jens is quite well known in the progressive rock/jazz world and has played with the likes of Jonas Hellborg, Tony MacAlpine, Yngwie J. Malmsteen and Allan Holdsworth among others.
Best,
Ron