welcome to this wonderful country. Bullarabs find, locate and hold boars as long as they are from the right bloodlines. pitbulls are easy to get a hold of but are illegal in most states. American bulldogs make great catch dogs and are always eager to tackle a boar, once again it comes down to the right bloodlines as they must be leggy to chase down fast boar.
if you want three dogs as a team i would try to get a bullarab, bullygrey and wolfhound cross then see which one suits you best as it depends on the country you will be hunting.
good luck bud.