Or, or, here's a thought, there's absolutely no reason whatsoever for character's sexual orientation to matter in the game.
Seriously. Not everything has to send a "[insert some group here]'s rights" message.
Taric doesn't "come out of the closet" because it's completely irrelevant. The only remotely canonical relationships are a theorized relationship between Ezreal and Lux as a running joke, and a political marriage between Tryndamere and Ashe for Freljord (and that might not exist any more, I'm not sure).
No, League of Legends does not need a LGBT posterboy, just like it doesn't need a "straight" posterboy. Sexual orientation is a completely unimportant topic within the confines of the game, and forcing it in there just for it to be in there is stupid. For all we know, Darius and Swain are banging each other, and we'll never know, because it does not matter.
The incessant need of some (emphasis on some) members of the LGBT community to make sure there's "representation" in video games is idiotic and adds nothing to the games they force it on. It never adds anything except now there's "the gay character", purely to have "the gay character" in the game.
Sure, Taric's effeminate, and very well might be homosexual or whatever. Congratulations, good for him, glad he's happy. Guess what? He's the same person regardless of orientation. All you're doing is defining a person/character by something they're born as, which is literally the entire basis for all ignorant prejudice in the history of the human race. Taric could be straight as an arrow and still be his "outrageous" and effeminate character.
Riot just showed you they advocate for the equal treatment of LGBT persons, and your immediate response is to say "give me more confirmation!" and try to guilt-trip them into specifying champion orientations? I'm not asking Riot specifically state which champions are straight because a) they're characters, and b) their orientation doesn't define or affect their game-play and has no place in this game. League isn't a romance game, and it's not a story driven game, and what Taric or any other champion does with their junk doesn't change who/what they are as characters.
This kind of "WOOOHOO I'M DEFINED BY SOMETHING I WAS BORN AS!!!" attitude is just as ignorant and harmful to humanity's progression toward treating each other as people as any homophobe or racist is. How you were born doesn't matter, and you shouldn't be treated as if it does.
Apologies for the angry post, but this stupid topic comes up at least once a year, and every year those of us with functioning brains have to sit here and think "Are you friggin' serious?" and it gets old really fast. It's a ridiculous and irrelevant issue.