I have two local sources for white ash, and one for Hickory in 8/4". I'll keep a look out for white oak, do you think it has any advantages over Hickory?
"White oak machines well, nails and screws well although pre-boring is advised. Since it reacts with iron, galvanized nails are recommended"
One of my local suppliers carries it but that part of the description has me leaning back towards ash or hickory. I'm guessing the ash will be cheaper, and know it will be easier to work.
If in fact you can get your hands on Hickory that definitely is the way to go. The ideal properties you're looking for make most other woods a lesser quality substitute and that's why boat loads of Hickory goes over to handle makers in Europe. Hickory does not grow in, or anywhere near, Sweden! Ash, Beech and Birch - handled implements in Europe tend to feature larger eyes and thicker hafts.