Hard to find something similar to Yes, maybe check out Jonathan Wilson - Desert Raven. I think it has a similar vibe.

Hello! I’ll make some album recommendations, because its easier. :-)

• Chris Squire - Fish Out of Water (solo album from Yes’ bassist)
• King Crimson - In the Court of the Crimson King
• Wobbler - Dwellers of the Deep
• Jon Anderson - Olias of Sunhillow (the first(?)of many solo albums from Yes’ singer)
• Rick Wakeman - Journey to the Centre of the Earth (legendary solo album from Yes’ glitter-cape wearer/keyboardist)

Um…

• Riverside - Rapid Eye Movement
• Among Authors - I Am Become
• Van Der Graaf Generator - H to He Who Am the Only One
• Unitopia - Artificial
• Steven Wilson - Grace For Drowning
• Porcupine Tree - Signify
• Sigur Ros - anything, all of it, they exist unto themselves
• Rush - Caress of Steel
• Pure Reason Revolution - The Dark Third
• Marillion - An Hour Before its Dark
• The Tangent - Down and Out in Paris and London
• Resistor - Rise
• Gazpacho - Night

Thats a good start, anyway.