An author that I've always enjoyed is Timothy Findley. He unfortunately passed away about a year or two ago, his novel The Wars is read in Canadian high schools. The majority of his works are not particularily gaythemed, but still very much a good read.

Some of his novels...
The Butterfly Plague.
The Wars.
Famous Last Words.
Not Wanted on the Voyage. - very good!
The Telling of Lies.
Headhunter.
The Piano Man's Daughter.

He has also written many short stories and plays.