WILL PAYTON!!!!!
Will Payton was the first post-crisis Starman. He got his powers when he was camping in Arizona and was hit by an energy beam that was meant to give powers to a bunch of bad guys called The Power Elite.
His powers were super-strength, flight , the ability to create massive amounts of heat and light, to increase his density to further increase his strength and invulnerability, alter his appearance, and survive in space unaided without air,food or water.
His sister eventually married Jack Knight, so he's Jack's brother in law.