It is possible to build any character you’d like. There’s no “right” method to make a character, particularly in 5e. Regardless of what you choose to accomplish the character will “work”, but for those who’d like some ideas for using a goliath’s stats additional optimally the following builds are good https://dnd-human93579.newsbloger.com/28517933/new-step-by-step-map-for-genasi-pathfinder