I didn't read most of this thread, but I'll give it a shot without looking and then compare.
This is just my gut speaking, without any previous thought or deep consideration:
Harry: 6w5 OR 8w9 , on first impulse.
However, I just thought about this for a few minutes after writing the rest of the list and I'm going to go with 8w9. I don't see fear as a base for him. He's more impulsive than reactive when it comes to fear.
Hermione: 1w2, possibly 3 or 5 fixed. (Candidate for triple-competency? Or maybe 1-5-4?)
I can also see her as a 5w6. Thoughts?
Voldemort: Not sure - 8w7, 7w8 or 3w4. He's kind of a 1-dimensional character, but I guess "power hungry" describes it best. =/
Snape: 4w5, 5wX, 1w9.
I think one way or another he's definitely a 4w5 with a 5 fix. Not sure about his gut fix.
I can see an argument for core 5, too.
The Weasley twins: 7s without a doubt! 748, perhaps?
Arthur Weasley: 5w6.
Bellatrix: 3w4 or 3w2, probably? ... could she be triple-id?
Ginny: Really hard to read, maybe 9w8, 2w1... no idea really. 4w3, maybe.
Viktor Krum: 8? I say this because of the "I'm a badass star but I'm vulnerable with my woman" mentality. But if anyone else has ideas on this I'd love to hear.