Raphael is a romantic archangel name that sounds both artistic and powerful. Raphael is also a great cross-cultural choice, with significance for people with both Latinate and Jewish roots, plus plenty of grounding in the English-speaking world.
Raphael was one of the seven archangels (called by Milton "the affable archangel") who attended the throne of God and, as the angel of healing, is the patron of doctors as well as of travelers, science and healing. Another worthy namesake is the great Renaissance painter Raphael (born Raffaello Sanzio).
Raphael is particularly popular in France right now, where it's a Top 10 name. Rafael is the Spanish spelling, as represented by Spanish tennis champ Rafael Nadal. Rafi is the familiar Hebrew nickname.