Here is my Influence Map of most of the people who have been an influence in my art and continue to be my inspiration. Mostly Old school, some new school. There it is.
Marshall Vandruff would refer these to be 'Touchtones'. If I were to pick just the 'Old Masters' (from this list), they would just be:
*John Singer Sargent
These are my artistic inspirations besides the obvious ones like Life experiences, Nature, Animals, Humans, Music, Dance, Culture, Science, Wonders of the World, etc...
*oh yeah, can't forget about Craig Mullins, one of the pioneers of digital art. AND... Ron Cobb, Syd Mead, Moebius, Ralph McQuarrie, Kazuo Oga, Wendling, & Barbucci+Canepa.
Here's the original template(from Deviantart) that you can use to make your own: