Sunburst

Sunburst was a stallion from Sire's Hollow, Equestria who was last seen residing in Ponyville. He may have been the husband of and father of Luster Dawn, though it was unclear. Working as a crystaler in the Crystal Empire, Sunburst was a close ally to the Mane Six and a heroic figure in his own right. After became the Queen of Equestria, Sunburst worked as the Vice-Principal at her school.

He was not a wizard.

Later life
After Twilight ascended to Princesshood, Sunburst moved to Ponyville and wored Vice Principal at the School of Friendship. There, he may have founded a relationship with his boss and lifelong friend, Starlight Glimmer and had a kid together named Luster Dawn, but this was unclear.

IDW comics
Sunburst was the main character in the My Little Pony: Legends of Magic series up until when  took over but remained the framing character as the stories featured in the comics were the books and stories he was reading.