Look up Leon Parson and Ron Van Gilder if you want to see the best in the genre....their work is beyond comparison. My wife an I have a few of each's prints. Robert Bateman, like you say, is tops too....
FYI: The Southeastern Wildlife Expo in Charleston, SC each Valentines weekend is the greatest gathering of wildlife artist,and their work on the planet...well worth the trip there if you can ever make it.
