Nice choices, I really like Sadamoto's art and I was surprised by Fujishima's since I've only watched omg's anime.
Mine would probably be Katsuhiro Otomo, Takeshi Obata, and Akira Toriyama.
With Otomo his art style is very advanced for his era, and actually met with some criticism back then for being too realistic. Still, I think his art is amazing.
Obata's art in all of his work has always been amazing, but his latest work (while not an original story) show cases the old man's finest
(from Platinum End)
While Toriyama is copied way too much, his simple but perfect line work can never be reproduced.
Honestly though, I wouldn't want to draw like any of these artists; the art you make reflects your world, and no art style to this point has fitted with mine. Does anyone else feel that way?
Edit: By 'perfect linework' I mean that each line, and the way he draws them, brings his world alive.