There are people out there who would sound metal with a Tele' into a JC-120. Heavy picks and sweat are the best possible tools here...
I tried to leave out the expensive brands
This was a point I was going to make, listen to the tones John 5 get out of a Tele. I left out the more expensive guitars, as regarding the Hamers you can usually pick up a decent 80 'standard' for not too much.
As for P90s theres nothing much heavier than a LP Jr being played to death. Theres also the LP doublecut range which to me sound different from the single cuts (I prefer the doublecuts).
I left out all the japanese brands (tokai come to mind for their Firebirds and explorers as well as the usual suspects in their range. BTW Kawai where into aluminum necked guitars and basses in the early 80s.
I would suggest heading into london for a day and have a look in wunjo & the rest of denmark St, not to buy anything, just to look at the more unusual 2nd hand items you will sometimes find something at a good price (it's hard but possible)
As a starter have a look here
http://www.wunjoguitars.com/ele.htm for the Schecter metal or the fernandes ravelle. Theres also a couple of Herbst (?) guitars which look pretty damned metal. I'm not recomending anything there just saying.
Hey I thought you said you didn't like SGs (gibsons best work after the Firebird and the LP Jr)
rob...