Goliaths are pretty lawful, and while lawful good and lawful neutral is pretty standard for a goliath, you might need to wonder about whether lawful evil can work for a goliath. Well, lawful evil doesn't mean that they are sociopaths, but rather that they respect law and order to an extreme degree, goliaths that are lawful evil can care about order and the rules, but they also care for themselves. So these creatures will focus on gaining glory for themselves, and also gaining glory for their tribe while also making sure they are recognized for it. They are generally unwilling to break the laws and also disregard individual freedoms, so they are very authoritarian. If you want a goliath that is very interested in following the rules and enforcing the spirit of competition and fair play at all costs, then you can have that. Other lawful alignments are also very easy to slip into if you decide to play them.