Professor Elam

He was the epitome of continental elegance, charm and grace on film and TV and in the late 40s and early 50s reinvigorated the Valentino/Novarro "Latin Lover" style in Hollywood without achieving top screen stardom. Moreover, unlike most minority actors of his time, he fought to upscale the Latin (particularly, Mexican) image in Hollywood. His noted militancy may have cost him a number of roles along the way, but he gained respect and a sturdy reputation as a mover-and-shaker within the acting community while providing wider-range opportunities for Spanish-speaking actors via Los Angeles theater. IMDB

Yep that's Ricardo Montalban. He achieved his most widespread audience on Fantasy Island at left.