He was the best Fantasy Artist ever.
I know, Vallejo, Rowena and all the "new" airbrush artists are great, too, but no one gave you this feeling of ... life in his pictures. I collected his German artbooks during the 70ies and grew up with all those fantasy books that bore HIS covers and of course some longplay records (those big, black discs with sequential playing through a needle).
I never read his comics, I am not THAT old, but saw some sample pages on his website. He simply was well versed in the different arts and thus a true artist of his time. Remember Barks, who did comics AND oil paintings.
He will be missed.