NSFW!!

"MTL likely to wake you up with their head at your crotch. (If you know what I mean)."
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Most:

1. Candy Pop
2. Laughing Jack
3. BEN Drowned
4. Eyeless Jack
5. Bloody Painter
6. Jane The Killer
7. Slenderman

Least: 

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Candy Pop & Laughing Jack: Okay, Candy Pop would do that just to mess with you. He has no shame and would love to see your reaction. Jack also has no shame but at least he won't do that to you when the other Creeps are around. These guys are shitheads...

BEN Drowned & Eyeless Jack: BEN would only do it if he's in the mood. He would also do it just to tease you until you wake up. Jack wouldn't really do it, but when he's in heat and you're around him? Oh boy, you're in for a night... (I added Jack in heat headcanon since a lot of people like it...)

Bloody Painter: Yeah, no. He's not that kinda of person. The most he'll do is accidentally touch you right there with his hands. I believe he's canonally asexual, so he's not all for that.

Jane The Killer  & Slenderman: Okay, but Slenderman doesn't really have a mouth. Even if he did, he would prefer to use his tendrils instead. Jane respects you enough to not do that without your consent.