Aside from your last comment about using black men as a cover, (for what, the mind boggles), I think you might be on to something, JimBryant.
The non-mainstream, or, underground is littered with gay, male artists: Stephin Merritt, Owen Pallet, Jamie Stewart, Edward Droste, Mike Hadreas, and Joel Gibb to name a few; but in the mainstream they are practically non-existent or ridiculously milquetoast and safe for suburban moms: Clay Aiken and Adam Lambert. Also interesting to note, both of those guys are famous because of the same reality show.
The mainstream still has a problem with articulate, strong, and challenging gay musical artists. Definitely something to think about.