I need someones advice on voice-over acting jobs, or art.

I can do a voice I have only heard in 1 video game (Sonic Riders, the final boss) and I can do his voice better than the original person. I can do the voice of Smegal from Lord of the Rings, and really creepy voices, and I want to let game producers know, or movie producers, etc. I want my voice to be used for a hero/villian kinda thing because I have a very dark/demonic/sinister voice I can do.

Excellent skill! From what I understand, it's a difficult business to get into (I'm not in it, but have followed the careers of some of the lead voice actors on some of my favorite animated shows). Probably the best thing you can do first off is to build a range of vocal skills and not just do impressions. You'll need to be able to actually create voices instead of just mimmicking them. Of course, there's nothing wrong with basing some of your voices on existing people (like how Chief Wiggum on The Simpsons is based on Edward G. Robinson), but in general, you should work on actually being able to look at a new character and instantly have ideas of what the character would sound like that are original. Beyond that, I'm not really sure what you would do aside from sending in demo tapes to agents or something. Some voice actors have also been discovered through radio work, so if you can try out for some radio shows to do comedy voices, that might help.