Tony Diterlizzi is something I found recently and whose art I find very impressive. Aside from him, there're the grand masters:
Hieronymusch Bosch,
Salvador Dali,
Sullied,
DaVinci's invention art,
Void's art.
I've forgotten small things, like how I'm especially fond of
this building, and other random pieces of art, but it's too much to sum up here, all those individual things.