I would put Alice Cooper as Marilyn Manson's biggest influence. With, maybe, GWAR in between. ;)
No, I do not like the Doors. Their music is not rock and roll, it's circus music, and clowns are kind of scary, so, you do the math. Kudos to Manzarek for eliminating the bass player from the pop music combo formula, but aside from that, I find them to be rather sleepy. Both as performers and as a form of home entertainment. But that's just me. And it has nothing to do with the fact that Morrison died before returning my Erector Set, which he claimed to be only "borrowing for a few days." Yeah, right. You try getting an Erector Set from a dead pop star's estate. The legal fees are outrageous. Yeah, I was 11 years old at the time, so what? Is that too old to cherish an Erector set? God, I hope I'm never as jaded as you!