Is LV modeled on Crowley?

[Tonks]

I friend of mine who knows a lot about magic and alchemy but has not 
read the books but has seen the movies says that LV is modeled on (You 
Know Who) Crowley. I asked why he thought that and he said that he had 
a picture of Crowley that looks a like like LV in the movie. So I 
searched the web.. I don't see a picture of Crowley looking like the 
snake like person of LV. However, I did find out some interesting 
information. Crowley and his followers did think that "there is no good 
or evil, only power and those too afraid to use it". So maybe my friend 
is right. Crowley was a person who practiced dark magic and was a bit 
crazy to boot.  I am looking at all of this, of course, for any clues 
as to what to expect in book 7.

Tonks