Beau, from LA, is a prolific illustrator of gay men's magazines such as Freshmen.
The link is a blog article which contains
to his hot works.
There is a CanadianGay SlideShow of his work
Nick Backes, (d.2013) from Oklahoma City, was best known as an illustrator of children's books,
which probably explains why his male art was played down on his own site. Here's a sample.
While most of the fantasy art of Peruvian-born Boris Vallejo is not specifically gay-oriented,
it is very definitely homoerotic, and
explicit fakes abound. The main link is to a site he shares with Julie Bell
Here is a link to a CanadianGay Slideshow