The greatest fantasy/sci-fi series of all time are, in my humble opinion:
Lord of the Rings
Red Rising
Stormlight Archive
Hyperion Cantos
Wheel of Time
Chronicles of Narnia
CS Lewis’ Space Trilogy
Zones of Thought
Mistborn
What else would you add? 
The greatest fantasy/sci-fi series of all time are, in my humble opinion:
Lord of the Rings
Red Rising
Stormlight Archive
Hyperion Cantos
Wheel of Time
Chronicles of Narnia
CS Lewis’ Space Trilogy
Zones of Thought
Mistborn
What else would you add? 
Andrzej Sapkowski - Witcher Saga (best fantasy books ever in my opinion)
R.A. Salvatore - Drizzt Saga
Planet of Adventure
First Law
King Raven
Troy
Harry Potter is elite.
I really liked these have you read the sword of Truth by Terry Goodkind? The sixth title,faith of the fallen, should really interest any capitalist
Stormlight Archive and Mistborn are so good. Really, all of Sanderson’s Cosmere novels are. Stoked to read Wind and Truth.
Have you also
Good list. I also really like Remembrances of Earths Past (Three Body Problem books)
Malazan book of the fallen
The Horus Heresy
Loved Iain M Banks ‘Culture’ works. Proper space opera. I suspect my reading of them today would be far more dystopian, but looking back his lead characters were always on the fringes and uncomfortable with the role of humanity in a galaxy run by AI (the ship Minds). I was gutted when he died, it was the first time I felt a personal sadness there would be no more books
Dune