None of them. Satanism doesn't accept "converts". Either you agree with what it has to say, or you don't. To "want to believe" it goes against the fundamental tenets of Satanism.
Now if you're asking about devil worship (which is a completely different thing), that's another story.
Well first, I'm Mormon, so I have no clue what's going on with the other religions. Mormons are very strong in their faiths, if they follow their beliefs. I don't believe any Mormon would to insane and convert into this so-called "satanism".
I don't think any and if they worship Chuck Norris well then Chuck will descend from heaven and beat you down for trying to convert someone to his enemy.
Any Christian can be converted! They are half way there already. They believe and perpetuate Satan's existence! Stop talking about Satan and he will cease to exist when no one knows who he is. Ahh, but then the Christians will have no scapegoat or nemesis.
a Catholic, they are already used to the ritualistic aspects, plus they have a tinge of evil in their heritage, such as the priest molester scandals and the torture chambers of the inquisition.
Mormons don't convert to anything, if they leave their church then they just worship on their own, no organized religion.
Amish, same as Mormons, when they leave the Amish religion they become individualistic or atheistic.
Baptists, interestingly enough, rarely if ever convert to anything else.
I would say a Mormon. I don't know about Satanism, but there are a lot of people who become atheist when they leave the Mormon religion. When they find out they were lied to they feel like they can't trust any religion.