First and foremost, Marilyn Manson.
Now, gimme a second to explain.
When I was in catholic school, I came across my dad's copy of Antichrist Superstar and hijacked it. I listened to that thing probably a million times, and it was the first thing that gave me any kind of hope at that time. I felt like I was listening to someone telling me "Screw 'em all, you can make it out, and you will". When I got more into him, and learned more about him as a person, I felt like I'd been right in the first place. I've always related to his music, his opinions, him in general. So, he'll always be my hero. He's inspired so much of what I've done, and even though I'll never meet the guy, I owe him a lot.
Secondly, Poppy Z Brite.
Has always been my favorite writer. I found "Lost Souls" when I was about 13 and fell absolutely in love with the gory, corny, gay-tastic-ness of it. I made my way through every single one of Brite's books I could find. I cried, I laughed my ass off, I fell in love with characters. Brite, like Manson, inspired me massively as well. I stopped writing "Safe" things and started just going with what I wanted to say, and how I wanted to. Then, a few months ago, I found out that Brite is also transgendered, and in the process of transitioning to male. I sobbed my eyes out, I've never felt such a weird kind of relief in my life. He has a short story somewhere, I've only found it once, where he wrote about always envying male friends and male everything. I cried throughout the whole thing.
Also, George Carlin. Why? Because hes' hilarious, caustic, offensive, and made some incredibly good points. The thing I loved most about his standup was that when I wasn't wetting myself from laughing, I was amazed that he wasn't some kind of revolutionary or something.