Here is an utterly wonderful illustration of Tarzan of the Apes by Spanish artist Benito Gallego. I love the sense of power in the figure. I first found Gallego's artwork on the short-lived Anthem series written by Roy Thomas.
Gallego channels the supreme power of John Buscema with more skill than anyone I've ever seen. He especially likes to illustrate Conan.
Here's a link which features a bunch more of his wonderful artwork.