Well, the alliance leader is a necro, so I guess that ends that.
Seriously though, I had the same thoughts when I joined the alliance. I guess like Ppar said it all comes down to a personal decision. If you feel that playing a Necro is wrong then don't do it. What truly matters is what is in your heart and conscience. I've always believed that some actions are "sins" for some people and not for others.
For example, You have a teen that has been raised in a Christian environment and goes off to college and starts smoking. This teen has always been told smoking is wrong and it's a sin to harm your body which is the temple of God. Yet he starts to smoke anyways even though he knows it's wrong. This is sin. Another teen, possibly his roommate also smokes. This teen is a new Christian and he's been smoking for 2 years now. He doesn't see the problem. He smokes, his parents smoke. Yeah, he knows it bad for him, but so are greasy hamburgers. He's never really thought one way or another about smoking as a Christian. To him this isn't sin. God knows his heart and unless another Christian takes him aside and says he really shouldn't treat the temple of God this way and he's convicted about it then it ain't an issue.
Same here. If you feel bad about playing a necro then don't. I agree with you about the guys. They are scary looking, but I think there are a few options to make them look nicer. I saw a rather handsome male necro in town the other day.
Oh yeah, and about the skimpy clothes... I have a female elementalist in Norn armor. Check it out. Her outfit could probably be worn to the Christian high school I graduated from and it would meet the dress code. She even has a skirt down to her knees. Eles are fun to play.