Artists I enjoy:
M.C. Escher EG
Salvador Dali EG
Henri Rousseau EG
Pablo Picasso is sometimes nice, eg Portrait of Ambroise Vollard EG
Georges Braque EG
Marcel Duchamp EG
Yves Tanguy EG
Emilio Vedova EG
René Magritte EG
Paul Delvaux - surrealist? EG
Roger Dean apparently did a lot of the Yes cover art EG
Georgia O'Keeffe EG
Gérard Garouste has some nice pieces EG
John Atkinson Grimshaw (Victorian) EG
Giuseppe Arcimboldo, EG The Librarian and that carrot one EG
Till Nowak - his tributes to Arcimboldo are nice, among others. He has some nice animations as well EG
Sarolta Ban EG
Aubrey Beardsley EG
Victor Vasarely EG
Patrycja Makowska does photos of derelict mansions, churches, etc. EG
Brian Froud EG
Trina Merry EG
Xavi Bou does interesting time-lapse photos of bird flight EG
Ruth Asawa has some nice wire sculptures EG
H.R. Giger is good. He did the Xenomorphs in the Alien films EG
Zdislaw Beksinski was a Polish horror painter who reacted to the horrors of war EG
Dr. Seuss has some very interesting work, apart from his children's books:
Jerry Sandefur is good. He's a digital-native artist that does a lot of fantasy/sci fi themed work:
David Zinn, the horsetopus guy who does 3d-looking chalk art on sidewalks and things. I saw something like this in SoCal once - was it him? I think it was probably Huntington Beach, back when I was riding my recumbent a lot:
Boris Vallejo - fantasy art, photorealistic, frequently with dragons or other animals, and body builders / fitness models EG
Maliwawa figures are Australian Indigenous cave pantings EG
Isabella Clever, child artist, hyperrealist: EG
Heinrich Kley is interesting. He does mostly monochromatic fantasy-themed pen-and-ink. I've heard that he sometimes satirizes the church. He was banned by the Nazis. EG
Yamamoto Akane
Rob Gonsalves is rather Magritte-like
Pedro Friedeberg