My absolute favorites for toneboards are bloodwood and Ipe. The Ipe is like tying to turn a rock, but the sound is amazing. I made a comp call for a buddy thet was all wood using Ipe and Jatoba, and it was fantastic sounding. I also highly reccommend Jatoba as a cheaper alternative for toneboards. It turns like butter, and finishes like glass.
Bob
P.S. - for that raspy, old school sound, it's hard to beat walnut or maple.