Re: Most 'versatile' tonewood?
I don't really think there is a supremely versatile tone wood. For one, each piece of wood will differ from the next, even in the same species (hell, in the same TREE sometimes). Also there can be several different variations of the same basic wood type that can make tonal differences (northern ash vs. swamp ash, etc).
The best you can do is make sweeping generalizations which might not even apply to 4 out of the 5 guitars at your local music store of that wood type. IMO there is no wood that is really all that close to being of an even or flat frequency response, which would be ideal if you wanted the axe to handle any style w/ just a pickup or amp swap.
Just look at the fact that many people in this thread have expressed distaste for basswood or say it's dull/lifeless, while several builders like Tom Anderson and Suhr absolutely LOVE a basswood body with a maple cap, claiming it to be the ultimate tone wood combination. I don't think it's a case of a most versatile, as much as there just being a "best for this application" type of thing.