Jose Orozco (1883-1949) was the most prolific of the muralistas, painting murals primarily in schools all over Mexico and the United States. He was also the adept at beefcake, using muscular men to signify what is important and valuable in the human spirit.
Others use more universal themes, such as "Prometheus," the Greek god who brought wisdom to humanity (in the Frary Dining Hall at Dartmouth College).
No indication if Orozco was gay. He was married, with three children, but during his era, many gay people married.
The best place to see his murals is in the Orozco Room at the Hood Museum, on the campus of Dartmouth College in Hanover, New Hampshire (about 2 hours north of Boston).