X-Treme X-Men Volume 2, an Exiles-esque book starring X-Men from alternate realities, gives us Governor-General Howlett and his boyfriend.Alan Scott (from the Justice Society of America) is depicted as this in the reimagined New 52.Give Me Liberty has the Aryan Thrust, a group of Manly Gay White Supremacists.Many characters from Patrick Fillion's gay porn superhero comics (practically nothing you will find by web-searching will be safe for work).He also has Macho Camp elements (pink skin, said to have great taste in home decoration, very romantic with his boyfriend), but he was primarily a big strong man who happened to be gay. Bloke from X-Force, an avid bodybuilder and especially brutal vigilante.By implication, Hooded Justice and Captain Metropolis from Watchmen.
Apollo and the Midnighter (Apollo is slightly less exaggeratedly tough and may be more of a Straight Gay) from The Authority.Colossus, in Ultimate X-Men (set in the Ultimate Marvel universe) is gay, and that doesn't reduce his manliness one single iota.The character, created by John Byrne, was designed to come out a decade prior in Alpha Flight, but the editor of Marvel Comics at the time was against it, so Byrne and his successors just wrote lots of subtext in. Northstar is arguably the most well-known gay superhero of all-time. In 2013, Astonishing X-Men #51, Northstar marries his partner on the cover, and the issue was widely heralded as another groundbreaking moment in comics.
It was a groundbreaking event in comic history, as he became the first superhero to say, "I'm Gay", and made international news.